At 13:18 Bernadette gets some salad on her fork but the salad is gone at 13:19.
It has been suggested that when Sheldon says that he and Amy were playing Scrabble and that he had all the letters to spell "Persimmon", that is not possible, as each player only has 7 letters, and Persimmon has 9. It would be possible to play "Persimmon" if "ON" was already on the board. Sheldon could've played P-E-R-S-I-M-M.
When Raj says that if he leaves Penny off his list there wouldn't be a list. But Raj had multiple affairs (one from Penny's Halloween party, another one from cafe, "deaf chick" and some others), which he himself refers to as eleven (excluding one girl from comic con).