I tried to explain the latter works to you in the other thread.
1. If we observe a derived population in the geological record before the basal population that will falsify evolution.
But you're using the geologic record to determine which populations are more basal or derived in the first place.
Generally speaking, animals found deeper down are assumed to be more "basal", and animals found only higher up are likewise assumed to be more "derived".
....Of course, sometimes the derived population show up deeper down than the basal population,(e.g. traces of advanced walkers found over 10 million years
before the famous Tiktaalik who was supposedly just starting to evolve primitive walking abilities)
When something like this happens, evolutionists simply imagine that the basal population must be even deeper in the rocks and just hasn't been disocvered yet. (so-called "ghost lineages") ... getting off in the weeds here, but it just goes to show how much freedom Evolution theory has to fit a preferred narrative to the fossils, whatever their order of succession may be.
For example finding a mammal species, like a rabbit, in a strata laid down before the evolution of mammals, would falsify evolution.
Here you are doing the same thing again.
You're unable to make any claims about where rabbit fossils should be found, without first having prior knowledge of where mammal fossils are found generally.
And the same thing with mammals in general. Without already possessing knowledge of the mammal-containing strata, you're unable to demonstrate how Evolution theory itself expects them to be found there.