Deductive Reasoning.

The logic reasoning you have described can be categorized as a form of deductive reasoning. Deductive reasoning involves drawing specific conclusions based on general principles or premises.

In this case, the premises are:

1. There is diversity.
2. There is a cause of diversity.

From these premises, we can seek to draw a conclusion:

3. Find the cause of diversity and find the purpose of life.

This reasoning pattern can be seen as deductive because it attempts to establish a cause-and-effect relationship between diversity and the purpose of life. By identifying the cause of diversity, one can uncover the purpose of life.

~ Wald Wassermann, Physicist