[Right in Wisconsin]

And how do you know those radio isotopes weren't created at a half-life? How can you be absolutely sure of this?

[WildTurkey]

And how do you know those radio isotopes weren't created at a half-life? How can you be absolutely sure of this?

Perhaps you should study a little about radioactive dating before asking a question that has no bearing on the accuracy of radioactive dating ...

[ThinkPlease]

And how do you know those radio isotopes weren't created at a half-life? How can you be absolutely sure of this?

Because we've never once seen it happen EVER in the nearly infinite number of atoms that we've observed. Because it is an observable that the laws that are currently in effect in our reality are very nearly the same laws and constants that were in effect as far back in time as we can detect with instruments.