From whose persceptive or relative viewpoint does a "thumbs up" mean?

[MC22]

Suppose there are two people on a planet with positive gravity, with a distance away from core as up, and towards the core as down. one person stands on his head. he sticks his thumbs pointing in a parallel direction to his body with the tip of his thumb nearer to his head. To him it looks like a thumbs up, to an upright observer it looks like a thumbs down.

Who is correct?

 

Relativity is kinda hard. Then again this question might not pertain to it as well as squished spacships.

[Liddojunior]

It's a thumbs down. The guy sent a message wrongly if his intent was to thumbs up , he should have known how the receiver would take it as. The receiver of the message is what matters in that case.

[puddingkip]

duuuudddeeee. Gimme that shit you're smoking

[Jymotion]

it's not a goddamn stapler

 

like you said, it's relative

[MC22]

Should we talk about squished spaceships now?

[ThatOtherChigga #Mack]

2smart4me

[~shenanigans]

The person standing on his head would be actually giving a thumbs down. Based on the definition you have provided, "distance away from core as up, and towards the core as down" and therefore it can only be a thumbs down. The receiver doesn't really matter, it is a strict definition based on the present conditions. Should towards the core as up be true, then he would be giving a thumbs up.