I tested.
I observed the test results.
Then I looked up what ought to have been the test results according to the progenitor of applying this practice to this application. There are a few sources where I would look for information like that. The others are the progenitor's family members and the one person the progenitor licensed to teach his research who unfortunately died earlier in 2025. I have the progenitor's books and the website of the person who passed earlier in 2025.
Test, observe, look up what should have happened, compare, perfect results, astronomically low odds that it could have been luck.