See exceptionable in American Heritage Dictionary 4
adjective
Open or liable to objection or debate; objectionable or debatable.
Related Forms:
ex·cepˌtion·a·bilˈi·ty noun
ex·cepˈtion·a·bly adverb
Usage Note: Exceptionable and exceptional are not interchangeable. Only exceptionable means “objectionable” or “debatable”; exceptional means “uncommon” or “extraordinary.”