If there are negative numbers- which there are, even though it makes no sense- can there be negative weight? As near as I can tell, negative mass is hypothetical, and basically impossible. But suppose it could exist- there are more things, etc. Can something that is weightless still somehow weigh less than something else weightless? After all, a negative number- a number less than zero- can be lower than another negative number, even though they seem like they shouldn’t exist at all. It’s a quandary: are all items lower than absolute zero equal, or is it possible to be even less than something that is nothing?