You seem to be claiming that it is possible for mathematical truths such as 2+2=5 to be other than what they are; I can agree with this on an epistemological level (since we don’t know all mathematical truths) but on on ontological level, no: mathematical truths are necessary truths. This is the conventional view though I’m not really sure how to argue it to a skeptic: but if you don’t see why 2+2=4 is a necessary truth then I claim you don’t truly comprehend why 2+2=4.
You seem to be claiming that it is possible for mathematical truths such as 2+2=5 to be other than what they are; I can agree with this on an epistemological level (since we don’t know all mathematical truths) but on on ontological level, no: mathematical truths are necessary truths. This is the conventional view though I’m not really sure how to argue it to a skeptic: but if you don’t see why 2+2=4 is a necessary truth then I claim you don’t truly comprehend why 2+2=4.