What facts did Redi's, Spallanzani's, and Pasteur's experiments establish? What broader scientific understanding about life did the experiments explore? How does the example of these experiments demonstrate science as a way of knowing?

These scientists all carried out experiments in accordance with the basic biological principle that life comes from pre-existing life. They investigated the theory of spontaneous generation and proved that life comes from life.

This also demonstrates that science is a way of knowing because they used what they saw in these experiments in other situations as well. They became able to do this only because they knew about this information and they got to know this information through science.