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→Zircon Dating: U-Pb dating, speed of light, etc.
::::Anyway, it's pretty clear to me that while the guy who proposed that the speed of light was once much faster in the past is technically correct (and incorrect at the same time), he doesn't really understand what this means. It would be the same thing as me giving a lecture on quantum mechanics. I don't understand that yet so I have no business acting like I do. --[[User:MichaelK|MichaelK]] 17:54, 12 May 2008 (EDT)
::::Anyway, it's pretty clear to me that while the guy who proposed that the speed of light was once much faster in the past is technically correct (and incorrect at the same time), he doesn't really understand what this means. It would be the same thing as me giving a lecture on quantum mechanics. I don't understand that yet so I have no business acting like I do. --[[User:MichaelK|MichaelK]] 17:54, 12 May 2008 (EDT)
::::: I see the distinction you were making, but "creationism" is largely (although not totally) synonymous with "young Earth creationism" anyway.
::::: I'm not quite sure what you are getting at with your comment about speed-of-light measurements centuries ago. The fact is that the speed was measured, and although it was not measured with the same precision as today, it was done pretty accurately and without the modern methods.
::::: Regarding the lead leaching in or out, the quote I provided about referred to the uranium and/or thorium leaching in or out. I think your point is that the two isotopes of lead would leach equally, but because they are produced at different rates, there would be different amounts, so they would not likely leach in proportion so that they two isotopes agree. I'm not sure that this is valid; why wouldn't they leach in proportion? But regardless, what if the uranium leached in or out?
::::: I don't see why anyone should acknowledge the "possibility" that the ages are true when there is much good evidence that is consistent with the world being much younger.
::::: Instead of this article or the Age of the Earth article, how about the [[radiometric dating]] article?
::::: I think you're way off the beam with the speed of light matter (no pun intended). Light is not ''defined'' to be 299,792,458 metres per second, but ''measured'' to be that. Certainly, defining the metre in terms of the speed of light confuses that, but it is also ''measured'' in feet per second. If the speed of light doubles, and therefore the metre doubles, does the foot double also? And if all that is so, does the distance between the Sun and the Earth double? And would we not notice the sudden lurch? And why bother measuring the speed of light if it is ''defined'' to be a particular speed? It's like measuring a one-foot ruler with another one-foot ruler, not to see if the first ruler was accurately made, but to see how long one foot is.
::::: So I disagree that the bloke who proposed that the speed of light was faster in the past didn't really understand what that means.
::::: [[User:Philip J. Rayment|Philip J. Rayment]] 10:16, 13 May 2008 (EDT)