I actually think it was somewhat of a misunderstanding. All of Reb’s proofs were for the din of stolen matzah, not mitzvah habaah b’aveirah. It seems like he thought I was talking about stolen matzah specifically rather than the misuse of a certain concept. I don’t think his subsequent comments were made after seeing my reply; it seemed like things got posted in a weird order. It might have just been my computer.
