Physicists just write “g”. 😝

That bit of the napkin has a smudge.

We’ve seen this movie, haven’t we?

Note that you can’t see the black hole in this image (an optical HST image). The black hole was identified through microlensing of the object labeled “source”, followed by subsequent astrometric observations. The black hole is the lens, which is not seen in these images because it’s too faint.

Except that might “prove” to them that you have something to hide.