[ColdWater]

Will we have to scrub geology, astrophysics, palentology, archaeology, etc. of any reference to a date prior to an actual observed event?

There is no proof that an observed event in the past is an observed event. It may have been programmed into our memory cells by the Creator so as to give us a past that we can connect too.

[tacticalogic]

There is no proof that an observed event in the past is an observed event. It may have been programmed into our memory cells by the Creator so as to give us a past that we can connect too.

Indeed. The assertion that a past observed event was actually observed would offend the Last Thursdayists.