When Chang is explaining to Jeff how he wants to embarrass City College, Jeff is writing "the 3 D's" on a piece of glass. He writes these words in this order: "Discredit, Denial, Destroy". Later on in the episode, when Annie is holding the school records of Ruffles, that same piece of glass can be seen in the background, but this time the "3 D's" are in this order: "Denial, Discredit, Destroy".
While Ruffles is referred to as female, the dog playing the part is visibly male.
The dog's transcripts are printed on paper with the E Pluribus Anus logo for a watermark. But the logo shouldn't have existed at the time; it was invented by the study group.