- gamertag: [none]
- user homepage:
No, we can't be certain of anything globally. We lack the ability to test that...deeply, and have to mostly rely on our brains decoding sensory information. While we have a good idea whats going on at many scales, we don't know everything going on at any specific scale, much less all scales, all the time (which IMO is a necessity to describe all reality).
Beware, the above is a subjective supposition, with no actual scientific elements past axioms. Opinions abound.