Everyone knows the rule that ambiguities are interpreted in favor of coverage, but not very many people have explored what the rule really means. At what point is something "ambiguous"?
The majority of courts apply a test that will find "ambiguity" if a provision is subject to two or more "reasonable" interpretations. A few courts, as well as secondary contracts literature, take a more conservative approach and find "ambiguity" only if two interpretations are equally reasonable. If, using the rules of construction, one interpretation is more reasonable than the other, the provision is not ambiguous.
Which approach is normatively better? I am currently working on a law review article exploring this question. My initial thoughts were sketched out in an article in the New Appleman on Insurance Current Critical Issues in Insurance Law monograph series.
My view is that the narrower, more conservative approach is normatively superior. It promotes more consistency, follows linguistic practices, and better tracks the parties' expectations.
The narrow rule promotes consistency by reducing the number of cases in which ambiguity is found. By limiting cases of ambiguity to those in which the proffered interpretations are equally likely, the unitiverse of possible ambiguities is reversed. While there will still be difficult cases at the margin, which can result in inconsistent outcomes, overall there will be fewer such cases.
The narrow rule follows lingusitc practices by allowing the court, which is similar to a reader or listener, to use rules of interpretation to "disambiguate" the provision. An ordinary reader or listern doesn't simply choose any reasonable interpretation when making an interpretive decision; he or she will choose the most reasonable interpretation. Thus, in most cases the ambiguity will be resolved through an interpretive device (context, body language, understanding the purpose, etc.) But there are instances when two interpretations seem equally likely, and in those instances it is sensible to use contra proferentum as the tie-breaker.
Finally, the narrow rule better tracks the parties expectations. The insurance policy governs the relationship between the parties, and the language of that policy creates certain expectations. While it is true that many policyholders, especially individual consumers, do not read their policies, they expect that the terms and conditions of the policy apply and should have some level of responsibility for their failure to read the policy. Moreover, the insurer has fairly well developed expectations of the scope and meaning of the policy that are used in the underwriting process. The narrow view is more likely to be consistent with these expecations by avoiding interpretations that, while reasonable, are less reasonable than another interpretation. Tracking expectations promotes fairness in interpretation, avoids possible cross-subsidies from insured to insured, and promotes consistency between claims adjusting and underwriting.
I am very interested in the thoughts and comments of others about these views, so I welcome posts or individual correspondence with me.