| Answer | Crossword Clue |
|---|---|
| CONCRETEEVIDENCE | Absolute proof at the construction site? |
| IDCARD | Proof at the door |
| ECCE | ... signum (look at the proof: Lat.) |
| QED | Abbr. at the end of a proof |
| STUB | Proof you were at the big game |
| QED | Letters at the end of a proof |
| QED | What a prof might write at the end of a proof |
