Adam kept his mouth shut.
That’s really how sin entered into the world.
We put it all on Eve: we shouldn’t.
Adam knew to do right.
Adam was with her when she was talking with the serpent – and said nothing.
Adam had already named the serpent; therefore he had dominion over him, which he chose not to exercise.
Adam heard God Himself give the command not to eat of the fruit of this one tree.
Adam did nothing.
I think this original sin was more about omission than commission.
You may not be doing anything wrong: are you doing anything right?