Read the page. Half life is precisely defined.
Your claim half-life doesn't apply is incorrect. All atoms undergo radioactive decay, so half life applies as precisely to all matter as is does to uranium.
Your claim half-life doesn't apply is incorrect. All atoms undergo radioactive decay, so half life applies as precisely to all matter as is does to uranium.
Are you sure about that?
Ultimately quantum tunneling will get them all. There is no known mechanism to prevent it.
So if the essence of a thing breaks down, and the model for it is exponential decay, then it has a half life.
Thus DNA has a half life, just as the paper in Nature, one of the premier scientific publications in the world, demonstrates.
My explanation was to point out that even if you don't like the definition in the article, that there are other valid ways to define half-life for atoms and complex molecules.