[VadeRetro]

Or, from outer space, as the Big Bang theory suggests all matter originated from... last time I checked water is H2O and still scientifically considered to be matter.

Fine! A new one. The flood water came from the fountains of the deep, or the vapor canopy, or outer space. More diversity! Evidently, your diversity is your strength.

[Sir Francis Dashwood]

The fact is nobody knows, that much is certain... to claim otherwise is no different in logical fallacy than creationism in the ‘appeal to false authority.’

[King Prout]

add this one: floodwaters slipped in through interstices separating bubble universes and entered the sidereal universe... exited presumably the same way in obedience to law of conservation of matter and energy.

I can't recall where I ran into THAT option