I feel like theres some deep significance behind the fact that the words "null" and "moot" have basically the same meaning. I'm pretty sure its a Freemason thing- those fuckers love mocking us like that.
Null and moot don't have the same meaning at all.
Null is nothing, the absence of anything. Also the dude who runs this place, but I don't think that's the null we're speaking off.
Moot originally meant meeting, a moot point meant it was something to be discussed later, not terribly relevant to the situation at hand. It doesn't mean a thing that has no importance, even though people do use it that way now, it's more of "Let's table that for now and move to more pressing issues".
Also, the Null Hypothesis is a concept in the scientific method in which any experiment needs to have a "null hypothesis" which is basically, the hypothesis that your own theory is wrong.
So, for example, the Null Hypothesis to the theory of gravity is some other thing causes the effects we attribute to gravity. The Null Hypothesis to Anthropomorphic Global Warming theory is that humans do not impact the climate through CO2 emissions. It seems silly, but it's actually a very important part of science, you can't prove anything right, but it only takes one thing to prove it wrong. The assumption has to be, I am probably wrong, so you can have some confidence when you continually fail to prove yourself wrong.