Maris Ayin

applies in private just as in public

doesn’t apply to what visitors see or think

eating a Pesach offering in a state of impurity that was originally slaughtered in a state purity

muzzling would be permitted when animal work is not threshing, but forbidden due to Maris Ayin

not using a sanctified vessel for water libation

Rav says Maris Ayin even applies in private, six mishnayos and beraisas disagree with Rav

wearing certain permitted fibers became forbidden due to their similarity to the forbidden types

would be permitted when animal work is not threshing, but forbidden due to Maris Ayin