Nah, absolutely not a certain metric. Biologists deal with life, and life is super complex. Way too complex to categorize into the little boxes that we desire.

Hybridization is very common in the animal kingdom, way more common than we realized in the early days of taxonomy… centuries before dna would be discovered.

No, this is how baseball has always been.

No one changed the rules -for people that watch baseball team no hitters have always been celebrated.

New Guinea was not connected to the mainland, so you couldn’t walk to Australia (or New Guinea)

We’ve known Clovis people weren’t first for decades.

Genetic evidence still suggests the first people in the Americas came from Siberia.

Genetic evidence contradicts the claim that South America was first populated by Polynesians.

Evidence suggests closer to 60k-45kya and they didn’t sail from Africa, they travelled to se Asia and down into sundaland which made the actual sailing much easier.

The dingo is genetically an offshoot of the domestic dog. Populations became wild again after being domesticated.