What was the sin of Nadab and Abihu? The text of Leviticus 10:1-7 is ultimately unclear about this. One Pentateuch scholar aptly calls this an instance of “intentional ambiguity” on the part of the storyteller/author (see Schnittjer, 99, 324, 413-414). So perhaps we will never know the answer for sure. Nevertheless, many people have contemplated this question, and there are many suggestions out there. How do we evaluate the relative merits of these suggestions? Is there a way to distinguish the plausible theories from the implausible ones? I think so.