I’m going to immortalize this somewhere other than on the forum to which I belong, because I thought it was hilarious. This is what happens when teenagers attempt to argue, somewhat seriously, a completely pointless topic. 

if one smelt it, have they really dealt it?

It has been stated the first to smell it truly is the one who deals it, as everyone is particular of their own gas secretions.
Scientifically though, it is possible to rip and run, and follow through with a silent run, confusing many as to who had farted.
But he who denies it, does he supply it?

Hypothesis: He who denies it supplies it.
Experiment: One of two people farts in a room. Two third parties blame each suspect of the deed. Both deny.
Proof: If there is one fart, yet two deniers, then the denier is not necessarily the supplier.
Experiment2: One of two people fart. Both suspects are asked by a third party if they did it. The guilty party confesses to his deed, while the innocent party denies.
Proof: If the supplier can choose to not deny it, then the denier is not necessarily the supplier.
Results: He who denies it supplies it is not a legitimate theorem.

its like schrödinger’s fart

either person could have farted until someone admits it

until someone admits it, the fart is in a quantum superposition

I have found that, at times, he who said the rhyme did the crime.

Interesting.
I see I have much to learn on the philosophical quandaries of flatus.

I did it. It was me.

Forums. They’re fun, aren’t they?