ton, Contracts [3d ed.], § 600, p. 280). At the same time the test on a motion for summary judgment is whether there are issues of fact properly to be resolved by a jury (CPLR 3212, subd. [b]). In general the courts have declared on countless occasions that it is the repsonsibility of the court to interpret written instruments (Williston, op. cit., § 601, p. 303). This is obviously so where there is no ambiguity. (Bethlehem Steel Co. v. Turner Constr. Co., 2 N Y 2d 456.)
If there is ambiguity in the terminology used, however, and determination of the intent of the parties depends on the credibility of extrinsic evidence or on a choice among reasonable inferences to be drawn from extrinsic evidence, then such determination is to be made by the jury (Restatement, 2d, Contracts, T. D. No. 5, § 238). On the other hand, if the equivocality must be resolved wholly without reference to extrinsic evidence, the issue is to be determined as a question of law for the court. (Cf. Mallad Constr. Corp. v. County Fed. Sav. & Loan Assn., 32 N Y 2d 285, 291.)
We hold that the interpretation of the provisions of the insurance policy in the circumstances of this case is an issue to be decided by our court on appellate review.
As the parties agree, there is no relevant evidence extrinsic to the insurance policy bearing on the intention of the parties at the time of its execution. Thus, there is no question of credibility and there are no inferences to be drawn from extrinsic evidence. As to the accident, the controlling facts are adequately before us. There is no controversy as to what happened when the cars collided, and there is no offer of further proof.
Additionally both appellant and respondent agree that this case presents no dispute of fact for a jury and urge us to decide the issue. To that extent they may be said to waive any submission of the issue to a jury.
We turn, then, to the substantive question of how the word “ occurrence ” shall be construed in this insurance policy on these facts.
Initially we observe that most of the reported cases involving similar questions of interpretation revolve around the number of “ accidents ” rather than the number of “ occurrences ”. Both parties urge, however, that the words “ accident ” and “ occurrence ” are synonymous. Past cases have used the