Sorry I was unclear.
What I meant was the repeatability of such one-off events is in different groups analysing the data and arriving at the same conclusions. Which you should have with any science study.
The point is that some noobees think that one-off events (or events from billions of years ago) cannot be scientifically studied unless they're repeatable.
Bull.
Edited by AZPaul3, : No reason given.
Eschew obfuscation. Habituate elucidation.