[split] Radiometric Dating

[Anomalocaris]

1) you have to assume the absence of the daughter isotope at the start of process.

In deed that is a solidly and verifiably grounded assumption, if the substance at the start of the process is a liquid and any daughter element in it, by well known and substantiated chemical and physical property of the daughter elments, would either precipitate, or outgas out of the liquid before it solidifies. Thus solidification marks the last moment of near total absence of daughter element. This is a pretty good assumption by any absolute scale and infinitely better assumption than a bunch of impressionable iron age yokels would have had any of the wherewithall to really known it really was god when they heard of the rumor of a Jesus or when some voice is said by a bunch of priests to issue from a box,

Also a pretty good assumption if the substance formed part of a living organism that must carry on exchange of chemical elements with an external reservior of known or strongly predictable content as part of its metabolism, so you know exactly how much daughter element there must have been in the substance right up to the minute when metablic function stopped. Again a vastly better assumption that some silly iron age tract by the name of bible is the word of god - an identification which no one can be shown to have any credible wherewithall to make, or that some fantasy of hearing god that came to your eagerly wishthinking mind would happen to corresponding to any form of reality as might be understood by any slightly intelligent and critical person.

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Yes, because mission projects in Africa and South America have done nothing to improve water systems and housing

And the knowledge that improving water system matters and how to improve it didn't come from your filthy bible or your good for nothing Jesus, and falsely selling the fruit of science in the name of your religion so you can trick more desparate gullible people to worship your "god" is no credit to what you are about to do.