“And he did not know” — if there were before him chelev and notar and he ate one and does not know which — he is exempt even from asham talui.
In the sugya: When both pieces are forbidden (chelev and notar), the eater knew he was sinning; only the identity of the particular prohibition is uncertain. Asham talui requires the possibility that he was entirely innocent.
Type of Learning
Miyut of “lo yada” — true uncertainty of whether any sin occurred.
What Is Learned
Asham talui covers only cases where the person may have been entirely innocent. When both available pieces are forbidden, the eater knew he was transgressing; the doubt is only which prohibition he violated, and that does not generate asham talui.