While I haven't seen this one, I have at least heard of it.

Amusingly, the way Lore is identified (using contractions) where Data doesn't is something I usually recall as being how they realise the transmissions supposedly from Data before he "dies" in "The Most Toys" are fake, while the write-ups for it say that they actually realise because "Data" is not following procedures exactly. I may not have seen the episode, but I know enough about it to get it confused with another.