Even taking everything else you write here for granted (which I wouldnāt normally, but letās go with it for now)ā¦ the question in your last sentence seems easy to answer: weāre not in that period right now, because right now, by construction, whales are more landmammals in 85% of ways, so if you classify them as mammals, and then use that to make predictions about heretofore-unobserved traits, you will be right 85 /ā 15 = ~5.67 times more often than if you had classified them as fish.
Even taking everything else you write here for granted (which I wouldnāt normally, but letās go with it for now)ā¦ the question in your last sentence seems easy to answer: weāre not in that period right now, because right now, by construction, whales are more landmammals in 85% of ways, so if you classify them as mammals, and then use that to make predictions about heretofore-unobserved traits, you will be right 85 /ā 15 = ~5.67 times more often than if you had classified them as fish.