[pdpi]

Everybody knows that coffee stains are the only surefire way to tell whether a paper has been read or just printed out and ignored. A colleague in uni (way back in early 00s) would add these to her documents every once in a while to give them the "has been read" stamp of approval.

[cossatot]

And wine glass stains are the only way to know your paper has been graded.

[pwagland]

And tear stains, or the lack thereof, are the only sure sign of quality.

[tengwar2]

Could Garibaldi read Narn?