Here is a premise:
We started walking on two legs between 6 million and 4 million years ago, tool-making began 2.5 million years ago, and our brains grew dramatically between 2 million and 1 million years ago.

Here is a hypothesis:
We became bipedal walkers 5 million years ago.

Is it possible to conclude that if the premise is true, then so is the hypothesis?
it is not possible to tell