Assumptions are pretty safe to make.
I can assume anything about you, reader.
I never have to prove my assumption. In fact, I can live with an assumption my entire life, regardless of the truth.
Our brains do that a lot.
For us to get better, we have to leave the safety of our assumptions and go into the wild territory of experiments. Experiments mean failure, at least if they are done in good faith.
So, for us to get a better picture of the world, failure has to come into play.
Let’s make this real:
Think about the last assumption you had?
How can you falsify it? What incident led you to make that assumption? What makes you say it’s right?
Does checking assumptions seem like a lot of work?
Maybe you should have fewer assumptions, while you are at it.