*380Majority: CLIFFORD, RUDMAN, DANA, ALEXANDER, CALKINS, and LEVY, JJ.
Dissenting: SAUFLEY, C.J.
CALKINS, J.[¶ 1] Glenn Jackson appeals from a summary judgment entered in the District Court (Belfast, Worth, J.) in favor of Paul and Pamela Rogers on their claim for enforcement of a promissory note. Jackson contends that a genuine issue of material fact exists as to whether his payment obligation under the note was subject to an unfulfilled oral condition. We agree and vacate the judgment.
I.
[¶2] On December 21, 1994, Jackson signed and delivered to the Rogers a promissory note in which he promised to pay them $3000, plus seven percent interest, with half the principal payable in one year and the remaining principal and interest payable in two years. Jackson did not pay any of the amount due under the note. In November 1998, the Rogers brought an action on the note in District Court. In his answer, Jackson denied liability, alleging that the agreement between the parties was that he would pay only if and when he was able, and he had not been able.
[¶ 3] The Rogers filed a motion for summary judgment. Jackson filed an opposition to the motion including a statement of material facts that admitted or qualified the facts stated in the Rogers’ statement by reference to Jackson’s accompanying affidavit. In his affidavit, Jackson stated that the note was part of a larger oral agreement: instead of foreclosing on a mortgage he held on real property the Rogers had bought from him, he would pay them $10,000 to buy back the property, they would pay any attorney fees, and he “would issue them a note for $3,000 to be paid if and when I was able.”
[¶ 4] The court granted the Rogers’ motion and entered summary judgment against Jackson. Jackson then brought this appeal.
II.
[¶ 5] We review the grant of a motion for summary judgment de novo, viewing the evidence in the light most favorable to the party against whom judgment has been granted, Longley v. Knapp, 1998 ME 142, ¶ 16, 713 A.2d 939, 944, to decide whether the parties’ statements of material facts and the referenced record material reveal a genuine issue of material fact, Levine v. R.B.K. Caly Corp., 2001 ME 77, ¶ 4, 770 A.2d 653, 655.
[¶ 6] Jackson’s statement of material facts and supporting affidavit raise factual issues of whether the parties’ agreement included a condition that Jackson was not obligated to pay unless he was able and, if so, whether he was able to pay. Neither the court’s order nor the Rogers’ brief on appeal explain why these factual issues do not preclude summary judgment.
[¶ 7] One potential explanation, hinted at by the Rogers, is the possibility that Jackson’s statement of material facts could be considered procedurally defective. M.R. Civ. P. 56(h)(2) provides in pertinent part:
A party opposing a motion for summary judgment shall submit with its opposition a separate, short, and concise statement of material facts. The opposing statement shall admit, deny or qualify the facts by reference to each numbered paragraph of the moving party’s statement of material facts and unless a fact is admitted, shall support each denial or qualification by a record citation as required by this rule.
*381All facts not properly controverted in accordance with this rule are deemed admitted. M.R. Civ. P. 56(h)(4); Univ. of New England v. Weinstein, 2001 ME 108, ¶ 2, 777 A.2d 829, 880.
[¶ 8] Jackson’s statement of material facts complies with Rule 56. It either admits or qualifies the facts asserted in the Rogers’ statement by reference to each numbered paragraph thereof and supports each qualification by a citation to the record. Jackson’s statement does not contain any factual assertions, but nothing in the rule or our caselaw requires that it do so. Cf. M.R. Civ. P. 56(h)(2) (“The opposing statement may contain in a separate section additional facts, set forth in separate numbered paragraphs and supported by a record citation as required by paragraph (4)of this rule.” (emphasis added)).
[¶ 9] Another possible explanation for the grant of summary judgment is that proof of the oral condition of ability to pay could be barred by the parol evidence rule. “The parol evidence rule operates to exclude from judicial consideration extrinsic evidence offered to alter or vary unambiguous contractual language. This proposition, however, presupposes the existence of an integrated contract.” Astor v. Boulos Co., 451 A.2d 903, 905 (Me.1982) (footnote omitted). Accepting the allegations of Jackson’s affidavit, as we must in reviewing a summary judgment, the agreement between Jackson and the Rogers was only partially integrated. “Where the parties to a written agreement agree orally that performance of the agreement is sub ject to the occurrence of a stated condition, the agreement is not integrated with respect to the oral condition.” Paine v. Paine, 458 A.2d 420, 421 (Me.1983) (quoting RESTATEMENT (SECOND) OF CONTRACTS § 217 (1981)). Even apart from the oral condition, the agreement was not completely integrated; the only writing, the promissory note, could not have been the entire agreement of the parties because it was merely a promise by Jackson that imposed no contractual duties on the Rogers.
[¶ 10] As a general rule parol evidence of additional terms is admissible to supplement a partially integrated written agreement if the additional terms are consistent with the writing. Astor, 451 A.2d at 905-06; RESTATEMENT (SECOND) §§ 215, 216. We have previously stated that this rule applies to proof of oral conditions. Burrowes Corp. v. Read, 151 Me. 92, 96-97, 116 A.2d 127, 129 (1955) (citing RESTATEMENT OF CONTRACTS § 241 (1932)). The Second Restatement, however, takes a somewhat different approach with respect to conditions, providing that inconsistency is merely one factor to be considered in determining whether and to what degree an agreement is integrated and does not per se bar proof of an oral condition. RESTATEMENT (SECOND) § 217 cmt. b; see Exch. Nat’l Bank v. DeGraff, 110 Ill.App.3d 145, 65 Ill.Dec. 683, 441 N.E.2d 1197, 1203 n. 1 (1982). We need not decide whether to adopt this approach because the oral condition alleged by Jackson is not inconsistent with the written promissory note.
[¶ 11] In deciding whether an oral condition is consistent with a writing, courts have observed that
[a] certain disparity is inevitable, of course, whenever a written promise is, by oral agreement of the parties, made conditional upon an event not expressed in the writing. Quite obviously, though, the parol evidence rule does not bar proof of every oraUy established condition precedent, but only of those which in a real sense contradict the terms of the written agreement.
*382Intercont'l Monetary Corp. v. Performance Guars., Inc., 705 F.Supp. 144, 149 (S.D.N.Y.1989) (quoting Hicks v. Bush, 10 N.Y.2d 488, 225 N.Y.S.2d 34, 180 N.E.2d 425, 427 (1962)); see also 11 RICHARD A. LORD, WILLISTON ON CONTRACTS § 33:18, at 650 (4th ed.1999) (oral condition is inconsistent if “repugnant to the conditions or terms actually stated in the writing [or] offered in substitution for them”). The ability-to-pay condition alleged by Jackson is not repugnant to the terms of the note and does not in a real sense contradict them. Instead, the condition, as a term of the larger agreement of which the promissory note is but one part, prevents Jackson’s payment obligation under the note from coming into effect until such time as he can afford to pay.
[¶ 12] In sum, because the oral condition supplements but does not contradict the writing, proof of it is not barred by the parol evidence rule. The existence of the oral condition is thus a question of fact; Jackson is entitled to present his evidence on that question even though the fact-finder may receive it with skepticism. See 3 ARTHUR L. CORBIN, CORBIN ON CONTRACTS § 592, at 554-55 (1960) (although it is “highly improbable” that parties to written contract would orally agree to condition on promise to pay, “[t]he ‘par-ol evidence rule’ should not be allowed to close the door” to proof of such condition).
[¶ 13] This conclusion is consistent with Article 3 of the Uniform Commercial Code. The promissory note here is a negotiable instrument. 11 M.R.S.A. § 3-1104(1) (1995). Article 3 provides that, as between the maker and original holder, a negotiable instrument may be delivered conditionally, id. § 3-1105(2), and, subject to non-Code parol evidence law, may be supplemented by a separate agreement, id. § 3-1117. Many courts have been especially willing to allow parol evidence of an agreement collateral to a negotiable instrument because including such an agreement in the writing would destroy its negotiability. WILLISTON § 33:34, at 740-41.
[¶ 14] We see no basis for concluding that Jackson did not raise genuine issues of material fact as to whether there was an oral condition to his obligation to pay the Rogers and, if so, whether the condition was satisfied. Accordingly, the District Court erred in granting summary judgment in favor of the Rogers.
The entry is:
Judgment vacated. Remanded for further proceedings consistent with this opinion.