creationism *does* have a scientific basis
... it's called "addition". As in, find any "begats" in the story, then add up all the ages of the begettor at the time they supposedly begat the begattee. Unfortunately, that's as "scientific" as it gets.
If creationists are serious about debate, I'd like to pose some questions, for instance:
a) how many of the begettors were under-age at the time they begat?
b) why did God feel it was necessary to speed up radioactive decay in the first ~7,000 years or so, while making all our experiments since Curie's time show that the rate of radioactive decay follows a fixed logarithmic equation? Is He trying to fuck with scientists specifically?
c) the light we see from stars are "past images" due to the time it takes their light to reach us. Why does that show that many stars are older than 7,000 years (even allowing for measurement error of up to one light-week)?
d) (anticipating the answer to (c) to be something about Genesis being metaphorical) how can we be sure when *any* day, week or a year in the Bible is meant to be interpreted as being a metaphorical day, week or year, or one in keeping with our current time-keeping devices? Isn't it equally possible that, say, Moses lived to be maybe a million or so of our current years?
e) on triangulation of sources for the ages of each person mentioned in the creationist timeline, is there any other authority for age of begetting besides God speaking through the Good Books? Eye-witnesses? Government ID records? Mentions in contemporary biographies? Anything? Anything?