Plaintiff-appellant Golden Rule Insurance Company (“Golden Rule”), an Illinois corporation, appeals a judgment awarding defendant-appellee Catherine Atallah (“Atallah”) $263,698.68 for medical expenses pursuant to an insurance contract (“the Policy”) between the parties. Golden Rule contends that Atal-lah’s illness, a meningioma, or tumor of the brain lining, was a preexisting condition excluded from coverage under the Policy and therefore the district court erred in not granting Golden Rule judgment as a matter of law. We agree that Golden Rule was entitled to judgment as a matter of law, and now vacate and remand so that judgment may be entered accordingly.
I.
BACKGROUND
By late 1991, those who knew Catherine Atallah realized that something was amiss with her. Divorced about eight years previously, Atallah, then 49, of Waterville, Maine, had become increasingly reclusive over the previous several years, and she was becoming increasingly unable or unwilling to perform the ordinary tasks of everyday life. She failed to pay bills, and her utility and telephone services were cut off more than once. She fell several months behind in mortgage payments on her home, and she allowed her driver’s license to lapse. When the doorbell or telephone rang, she often would refuse to answer. She bathed, changed clothes and combed her hair infrequently, and she left soiled pots and pans in her kitchen for weeks at a time.
A family friend persuaded Atallah to seek medical attention in June 1991, but a routine examination turned up no obvious clues to her condition. She also visited a social worker twice that summer, and explained that she was doing so to learn “why I am the way I am.” She failed to show up for a scheduled third visit and did not arrange a further appointment.
In November 1991, Atallah’s condition had deteriorated to the point that her oldest son, Peter Atallah, obtained from her a power-of-attorney permitting him to oversee her affairs. One of the first things Peter Atallah did was attempt to purchase medical insurance for his mother, who was then uninsured. This effort failed because of an apparent mix-up over the method of payment. In June 1992, Peter Atallah arranged for Dr. David Preston, an internist, to visit his mother at home. In a lengthy letter to Dr. Preston, Peter Atallah related his mother’s personal and medical history, including a previous thyroid condition and hysterectomy about eight years earlier. He told Dr. Preston that he and his brothers
want our mother back. We believe she is suffering from chronic depression, but that *514there are chemical imbalances (thyroid, estrogen) that are making a bad situation much worse. We cannot rule out the need for mental therapy, but we have not been able to get a handle on the whole problem.
Dr. Preston visited Atallah in her home on June 24, 1992. The ensuing physical exam yielded no remarkable findings other than that she had lost fifteen pounds during the previous six months and had suffered a gradual decrease in vision over the previous few years. Dr. Preston noted that Atallah’s thyroid condition should be rechecked and the cause of her weight loss determined. He also noted that he believed she was “a danger to herself though in a sort of low grade fashion,” and that he discussed with her the advisability of seeking inpatient psychiatric treatment “as she has really failed to connect” with anyone as an outpatient. In deposition testimony read into the trial record, Dr. Preston stated that Atallah did not think inpatient treatment was necessary but that she agreed to see a psychiatrist on an outpatient basis, and that he “thought that that would be a good start.” Dr. Preston did not specifically recommend that Atallah receive an EEG or CT scan. He recalled, however, that Atallah was reluctant to undergo expensive tests or hospitalization because of concerns about her lack of insurance coverage. At Dr. Preston’s direction, Atallah went to the hospital later that day for blood tests and a chest x-ray. These tests revealed no findings significant to her condition.
Dr. Preston then referred Atallah to Dr. Robert Croswell, a psychiatrist. Dr. Cros-well saw Atallah first on July 2 and again on July 9. He prescribed for Atallah the drug Zoloft, an anti-depressant. At the July 9 session, according to Dr. Croswell’s videotaped deposition testimony, he recommended that Atallah submit to inpatient evaluation because he was concerned that he was not getting a full and accurate view of the extent of her condition and he “thought that a good way to clarify the issue would be to get her into the hospital so we could do a more thorough evaluation....” While obtaining brain wave test results was not the primary reason Dr. Croswell suggested inpatient treatment, such treatment would have included these tests, Dr. Croswell testified, and would probably have led to the discovery of the tumor. Dr. Croswell also testified at his deposition that Atallah did not want to submit to inpatient evaluation because of insurance concerns. Later in that deposition, he stated that Atallah’s refusal to submit to inpatient treatment and her concerns about insurance coverage were not necessarily causally linked, and that “it certainly was never clear that the reason she refused was 'purely because of insurance coverage.” (emphasis added) Dr. Croswell’s handwritten notes from the July 9 session do not indicate that he. actually discussed inpatient treatment with Atallah on that day, or that she expressed concerns about insurance coverage. The notes do, however, contain a notation indicating that at the very least Dr. Croswell was considering the suitability of three different inpatient treatment facilities for Atallah.
Atallah did not keep her appointment with Dr. Croswell for July 23, but he did see her on July 27 and 28. On July 28, Dr. Croswell entered into a “contract” with Atallah. The contract called for Atallah to continue taking Zoloft and visiting Dr. Croswell at his office each week. If this treatment produced no improvement in three to four weeks, the Zoloft dosage would be doubled. If there was still no improvement in two months, Dr. Croswell testified, he told Atallah he would be unwilling to continue seeing her on an outpatient basis and would insist that she submit to inpatient evaluation.1 However, Atallah failed to show up for any further visits with Dr. Croswell.
In a letter to Maine’s Department of Human Services Disability Determination Ser*515vices dated August 4, Dr. Croswell wrote that Atallah “shows evidence of severe poverty of content of thinking with grossly impaired judgment at times regarding her own needs.” He wrote that it was his “impression” that Atallah suffered from a “gradually increasing disability” with the diagnosis of “major depression, severe and persistent,” and “passive aggressive personality disorder.” Dr. Croswell had “[n]o diagnosis” of any physical condition.
Meanwhile, after learning that his mother was still uninsured, Peter Atallah applied for Medicare/Medicaid coverage on her behalf. Expecting a delay before the application was approved, he purchased a short-term, nonrenewable medical insurance policy from Golden Rule, effective August 9, 1992. The Policy contained a clause stating that Golden Rule would not pay for medical bills attributable to preexisting conditions. The Policy defined “preexisting condition” as:
an illness2 or injury:
(1) for which the covered person received medical advice or treatment within the 60 months immediately preceding the Effective Date ...; or
(2) which, in the opinion of a qualified doctor,
(a) probably began prior to the Effective Date ...; and
(b) manifested symptoms which would cause an ordinarily prudent person to seek diagnosis or treatment within the 60 months immediately preceding the Effective Date....
On September 29, 1992, while talking on the telephone with her son Peter, Atallah suffered a “syncopal episode,” or fainting spell. She was taken to Mid-Maine Medical Center in Portland, where a CT scan and EEG were performed. To the surprise of her treating physicians, the tests revealed a grapefruit-sized tumor growing on the lining surrounding Atallah’s brain — in medical terms, a bifrontal olfactory groove meningio-ma.3 Atallah underwent surgery on October 8, 1992, and doctors were able to remove about half of the tumor. The medical bills for Atallah’s hospital stay, surgery and eight months of recuperative care following surgery totalled $263,698.68.
When Atallah submitted a claim to Golden Rule for payment, the company refused to pay, citing the Policy’s preexisting condition clause. In denying coverage, Golden Rule relied on both definitions contained in the Policy, explaining that Atallah had received treatment and advice for her illness in the five years prior to August 9,1992, and that it had obtained the opinion of a qualified doctor to the effect that her illness had manifested symptoms which would cause an ordinarily prudent person to seek diagnosis or treatment within the five years prior to August 9, 1992.
Golden Rule instituted a declaratory judgment action in the district court in May 1993. Atallah filed a counterclaim for breach of contract. During the two-day trial, Golden Rule’s expert witnesses, Drs. Norman Oes-trike and John Boothby testified that Atal-lah’s symptoms were such that she should have received a CT scan and EEG to test for the possibility of an organic cause of her depression. Atallah offered the testimony of Dr. Richard Toran, who testified that in his opinion there was no need to order a CT scan for Atallah before August 9 because her symptoms were all explicable by her personal history. All of the doctors who treated Atal-lah either before or after the ultimate diagnosis agreed that her severe depression and reclusiveness were caused by the tumor and that the tumor had been growing for many years.
*516After all the evidence had been submitted, Golden Rule moved for judgment as a matter of law, which the district court denied. The jury returned a special verdict for Atallah, concluding that her tumor was not a preexisting condition under the Policy. The district court entered judgment for Atallah in the full amount claimed. The district court then denied Golden Rule’s renewed motion for judgment as a matter of law and motion for a new trial, and Golden Rule now appeals.4
II.
STANDARD OF REVIEW
Our review of a denial of a motion for judgment as a matter of law is plenary. Acevedo-Diaz v. Aponte, 1 F.3d 62, 66 (1st Cir.1993). As did the district court, we view the evidence in the light most favorable to the nonmovant and decide whether any reasonable jury could have returned the verdict it did. See Sanchez v. Puerto Rico Oil Co., 37 F.3d 712, 716 (1st Cir.1994). Thus, we reverse the district court’s denial of the motion only if the facts and inferences “point so strongly and overwhelmingly in favor of the movant” that a reasonable jury could not have reached a verdict against that party. Aponte, 1 F.3d at 66 (internal quotation omitted). In performing this analysis, “ “we may not consider the credibility of witnesses, resolve conflicts in testimony, or evaluate the weight of the evidence.’ ” Sanchez, 37 F.3d at 716 (quoting Wagenmann v. Adams, 829 F.2d 196, 200 (1st Cir.1987)).
III.
DISCUSSION
We must decide whether a reasonable jury could have concluded from all the evidence that Atallah was entitled to recover under the Policy despite its preexisting condition exclusion. The jury concluded that Atallah was entitled to insurance benefits because her illness5 did not fit under either of the Policy’s definitions of “preexisting condition.”
Our assessment of the jury verdict’s rationality hinges on the meaning of the Policy’s preexisting condition clause. Under Maine’s general law of contracts, the interpretation of a contract is a question for the factfinder only if the court first determines that the contract is ambiguous, a question of law. Willis Realty Assoc, v. Cimino Constr. Co., 623 A.2d 1287, 1288 (Me.1993). Because exclusions from coverage in insurance contracts are not favored and must be stated clearly and unambiguously, ambiguities in such contracts must be resolved against the insurer. Baybutt Constr. Corp. v. Commercial Union Ins. Co., 455 A.2d 914, 921 (Me.1983), overruled on other grounds by Peerless Ins. Co. v. Brennon, 564 A.2d 383 (Me.1989); see also Maine Bonding & Cas. Co. v. Philbrick, 538 A.2d 276, 277 (Me.1988); Allstate Ins. Co. v. Elwell, 513 A.2d 269, 271 (Me.1986). However, this latter rule of construction “is a rule of last resort which must not be permitted to frustrate the intention the parties have expressed, if that can otherwise be ascertained,” Tinker v. Continental Ins. Co., 410 A.2d 550, 554 (Me.1980), and “a court may not rewrite the contract when the language employed is free of doubt.” Palm *517 er v. Mutual Life Ins. Co., 824 F.Supp. 254, 257 (D.Me.1971). Finally, we note that we must determine the intention of the parties by examining “the whole instrument,” and we must do so “with an eye to the subject-matter, the motive and purpose of making the agreement, and the object to be accomplished.” General Elec. Capital v. Ford Motor Credit, 149 B.R. 229, 233 (D.Me.1992).
A Interpretation of the Preexisting Condition Clause
The Policy’s language defines an illness as a preexisting condition if it fits either of the two definitions contained in the Policy’s preexisting condition clause. Under the first definition (the “Treatment Clause”), a preexisting condition is an illness or injury “for which” the insured actually received medical advice or treatment before the Policy’s effective date. The second definition (the “Symptoms Clause”) focuses not on advice or treatment actually received, but rather on whether a reasonable person would have sought diagnosis or treatment if afflicted with the insured’s symptoms before the Policy’s effective date. Because we hold that a rational jury could not have concluded that Atallah’s tumor was not a preexisting condition under the Policy’s Symptoms Clause, we do not address the proper interpretation or application of the Treatment Clause.6
The Symptoms Clause presents us with language that neither we nor Maine courts, as reflected in reported decisions, have previously confronted.7 Atallah argues that the clause must mean that the symptoms would cause a prudent person to seek diagnosis or treatment of a brain tumor or a similarly organic brain disease. On its face, however, the clause does not require either a correct diagnosis of the underlying illness or any awareness on the part of the insured or her physician of the nature of the underlying illness. The words “for which” — present in the Treatment Clause and on which our decision in Hughes8 turned — are noticeably absent from the Symptoms Clause. The Symptoms Clause presents a linguistically uncomplicated test. It simply asks: In the opinion of a qualified doctor,9 did the illness “mani*518fest symptoms” which would cause an ordinarily prudent person to seek diagnosis or treatment within the five years prior to the Policy’s effective date?
We are unable to ascribe any ambiguity to this test. We think the only plausible meaning of the phrase is just what it says. The clause does not require that the insured seek a particular kind of diagnosis — indeed, common sense tells us that one seeks a diagnosis precisely because one is uncertain of the cause of particular symptoms. It merely requires that the symptoms be such that an ordinarily prudent person would seek diagnosis or treatment. If an insured experiences such symptoms within the sixty months prior to the Policy’s effective date, then whatever illness is ultimately determined to have caused those symptoms will be deemed a preexisting condition and will be excluded from coverage.
Atallah argues that interpreting the Symptoms Clause in this way runs counter to the traditional function of preexisting condition clauses, which is to prevent fraud by protecting the insurer from people who are already sick but who intentionally delay diagnosis or treatment until after they purchase insurance.10 We do not agree.
It is true that denying coverage under a preexisting condition clause to a person who at the time of purchase has no idea that she is ill serves no fraud-prevention function.11 The Policy’s Symptoms Clause does not go so far; it would not exclude coverage, for example, of Atallah’s tumor if she had experienced no symptoms before the Policy’s effective date. The Symptoms Clause only denies coverage for undiagnosed illnesses if the insured is on notice that something is not right with her; to allow the insurer to contractually deny coverage for whatever may ultimately prove to be the cause of the malady in fact does serve the policy of protecting the insurer from deceitful purchasers. It is not difficult to imagine an uninsured person experiencing symptoms of unknown origin putting off medical diagnosis or treatment until he can purchase insurance.
Atallah, of course, actually did seek medical diagnosis and treatment before purchasing insurance. But the plain language of the Symptoms Clause affords no basis on which to make an exception for an insured who in good faith obtains an incomplete diagnosis and consequently fails to discover the full extent of her illness before purchasing insur-*519anee. The clause is an objective manifestation of mutual intent to insure against the risk of future illness or injury, not against the risk that an earlier diagnosis turns out to be wrong.
Furthermore, while interpreting the clause exactly as written in cases of incorrect diagnosis may not obviously serve a fraud-prevention function, neither does it impair that function. Medical diagnosis is an inexact art. A doctor’s ability to diagnose an illness correctly may depend on what symptoms a patient is experiencing at a particular time; how clearly the patient expresses her symptoms to her doctor; the doctor’s own experience and inclination to administer tests; and the patient’s willingness to undergo tests sooner rather than later. An insurer may well prefer to avoid these vagaries entirely and simply fix the time at which it will assume risk at a point before any significant symptoms occur. Indeed, Atallah’s “contract” with Dr. Croswell underscores this point. Far from being conclusive, Dr. Cros-well’s diagnosis of depression was a starting point from which he and Atallah hoped to find an underlying cause and appropriate treatment. While it is unlikely that Dr. Croswell would have discovered the tumor before August 9, it is likely that the course of treatment they agreed to would have ultimately led to the tumor’s discovery had she upheld her part of the “contract.” Atallah’s own conduct — perhaps beyond her own control because of her tumor, but certainly beyond Golden Rule’s control — hindered the diagnostic process by her failure to keep appointments, her reluctance to undergo expensive tests or hospitalization, and her denial of the seriousness of her symptoms.
B. The Rationality of the Jury Verdict
Having concluded that the Symptoms Clause is susceptible of but a single interpretation, we can only conclude that a rational jury could not decide that Atallah’s tumor was anything other than a preexisting condition. Atallah does not dispute that her reclu-siveness, severe depression and impaired judgment were, in retrospect, caused by her tumor, that the tumor had existed for many years prior to the Policy’s effective date, or that Golden Rule obtained the requisite opinion of a qualified doctor. While the jury might reasonably have concluded that an ordinarily prudent person afflicted with Atal-lah’s symptoms would not have sought diagnosis or treatment for a brain tumor, that is not the test.12 Properly instructed on the law, a rational jury could have reached no conclusion other than that an ordinarily prudent person whose mental health and ability or willingness to care for herself had deteriorated to the extent that Atallah’s did in the several months prior to the Policy’s effective date would have sought diagnosis or treatment-just as Atallah actually did in consulting Dr. Preston and Dr. Croswell. This conclusion is in no way undercut by the testimony of Atallah’s expert, Dr. Toran. Thus, Atallah’s tumor falls squarely within the second definition of the Policy’s preexisting condition clause.
We recognize that our literal interpretation of the Policy’s Symptoms Clause may lead to harsh results in some cases. But “sympathy ... cannot justify sophistry,” Hughes, 26 F.3d at 268-69, and the Policy that Atallah purchased permits no conclusion other than that her tumor was a preexisting condition. Therefore, Golden Rule is entitled to judgment as a matter of law. The judgment below is
Vacated and remanded for the entry of judgment consistent with this opinion. Costs to appellant.