Doubt "Big Bang"?
Well you should.
It can be said that: Under the conditions for which we need a working model, this 'Big Bang' hypothesis behaves in a way that consistently explains our extrapolations from observable phenomena. It also introduces some inconsistencies when take as a factual occurrence, when we introduce additional extrapolations from different phenomenal observations at quantum level. For those, notions such as "time" or "location" seem to be irrelevant, if not non-existent. This demolishes the very concept of actual measurement in any possible way - so let us posit additional models that require among other things, the hypothesizing of multiple, non-observed dimensions that nonetheless allow our maths to be validated and not face the ontological consequences of nothing being real.
Zeno had similar preoccupations, with time and position.