[BMCDA]

How would you for instance, verify the claim that our universe has evolve from a speck, 15 billion or so years ago, etc.? And how can you tell that the date of creation wasn't instead 16 billion years ago? This scenario may be true after all but it is simply not falsifiable and therefore it ain't science.

Uhh? Are you serious or is this just a joke?
We verify this claim by observing the universe and what we observe so far (CMBR, redshift of distant objects) is highly consistent with the big-bang model.
However, if you don't believe me you can ask a more authoritative source like RadioAstronomer.
I'd also recommend this website for additional info: http://www.astro.ucla.edu/~wright/intro.html

[Elsie]

Uhh? Are you serious or is this just a joke?

Both, actually; with a bit of mockery tossed in as well.