But maybe one day we will know how our brains work, and we will understand what is the neural correlate of "1" , "+" and "2" and we will be able to clearly see

But maybe one day we will know how our brains work, and we will understand what is the neural correlate of "1" , "+" and "2" and we will be able to clearly see that the only answer to 1+1 is 2 in an empirically falsifiable way.