What is the YEC answer to the lack of shorter lived isotopes?

Oh look, it's the Omphalos argument. Where YECs admit that all the evidence agrees with an old Earth. Sure. But the Omphalos argument goes much further than that. To continue with your analogy, it's as though God created Adam with a complete set of memories of his childhood, photograph albums of when he was a kid, an apendectomy scar, scrapbooks, a birth certificate, a certificate showing the he and Eve had got married ten years previously, photos of him graduating from university ...Yes, possibly God would have made a world that kinda looked old. But why would he fake every detail so perfectly as to fool everyone who does geology?As Reverend Kingsley put it: "I cannot believe that God has written on the rocks one enormous and superfluous lie for all mankind."

Calibration against organic materials of known age (eg old books) and against dendrochronological data show that this assumption is very close to the truth.Which measurements are you referring to? Do you not realize that these measurements, if they were made, were made by scientists, who have therefore taken them into account? No. The assumption that the laws of nature are uniform includes the "precise mathematical equation involving mass and gravity". No it wouldn't: this is just something you made up. Laid down under anoxic conditions? Then what is the source of the oxygen in the BIFs? It's not a premise that he wouldn't, it's a conclusion that he didn't.

Oooh, yes please.Another instance where creationists admit that the evidence supports an old Earth? Bring it on! Sure. But why did God miracle the Earth into existence in such a way as to support, in every detail, an old Earth and evolution?Either:* Scientists are right.* God faked the world in order to fool scientists.* God was obliged to make the world in such as way as to fool scientists, not with the intention to fool them, but for reasons that no-one has yet adequately explained.

Except when they claim that the catastrophe was caused by God doing magic.Or when the ignore the laws of nature entirely and just make stuff up. If by "catastrophists" you mean creationists, then no, they don't use the laws of nature, and usually their gibberish involves ignoring some fairly well-known laws. This is why, for example, they have their magic flood washing debris up mountains, despite the fact that the laws of nature say that that wouldn't happen, and why they have their magic flood miraculously accelerating radioactive decay, despite the fact that the laws of nature say that that wouldn't happen, and why they assert that this wouldn't melt the Earth and kill everything on Noah's magic boat with radiation poisoning, despite the fact that the laws of nature say that that is what would happen, and why they assert that the magic flood would produce the strata we see in the rocks, despite the fact that the laws of nature say that that wouldn't happen.Merely claiming that science is on their side is not using the laws of nature, nor even being aware of them.