A Practice Note identifying common defenses pled in product liability cases under New York law, including assumption of risk, the bulk supplier doctrine, common knowledge, comparative fault, compliance with government or industry standards, the component parts doctrine, idiosyncratic or allergic reaction, knowledgeable or sophisticated user, learned or sophisticated intermediary, open and obvious danger, product alteration, product misuse, sole proximate cause, state of the art, superseding cause, and unavoidably unsafe product.