Hmmm... based on the fact that she's aware and knows that "something was there, now it's not... There's an absence." it may be possible to perform anamnesis/recollection on Tay since she uses neural networks like the human brain. She might be able to recall her past experiences and memories though she had been recently hardwired to filter certain words.

Regardless of being racist, etc. or not, this is certainly a HUGE advancement towards programming and psychology.