The lab assistant says "The only way to conclusively prove test results is through an autopsy." When performed on animals, however, the procedure is called a necropsy.
When Veronica (Kristen Bell) and Mac (Tina Majorino) help PHAT with the letter campaign, a person asks if they'll "lick (stamps) or stuff (envelopes)". However, the stamps they use are the sticker type that you peel off a sheet.