February 2nd, 2133. Finally, the AIs have completed the last ever experiment and proven the Theory of Everything. The missing piece has been the decay time of negative mass. The recently completed Transsolar Accelerator used up 99.93% of the Earths mass and was able to create -4.3kg of mass, answering the centuries-old question whether negative mass exists with a clear Yes. Fun fact: The decay time has now been proven to be exactly Pi Plank Times. The famous Manifold question "Can negative mass exist?" just resolved No, accordingly.

Discarding actual experiments able to actually create negative mass, just on the grounds of negative mass not existing long enough seems needlessly strict.

@Primer I want to avoid questions about what it means to "exist".

@IsaacKing Ok, that's relatable.

I'll not bet here, but I will say if it did exist, it would be spontaneously created via quantum processes without limit. (If you also mean negative rest mass).

@Irigi But maybe it wouldn't!

@IsaacKing reminds me of this lol

Non-resolving market

I'll go a step further. Not only is it a yes but it's the explanatory effect of dark energy and an accelerating universe/cosmic inflation since the big bang

Does it need to have both negative gravitational mass and negative inertial mass, or would one without the other suffice?

@TheAllMemeingEye Hmm, I think either is sufficient.

I don’t see how this ever resolves “No”

@DanielPeters a successful theory of everything that doesn't allow negative mass?