I didn't collect data, I didn't compare it, I didn't test or retest, I wrote nothing, I did absolutely nothing involving science. None at all. I just did what people have been doing since we were people that's had a noted effect for helping people get over their prejudices.
I didn't say you engaged in formal science. I said you used scientific principles.
You 'looked at the world' = gathering data
You then formed a conclusion from that.
Your conclusion is then further validated as you continuously look more and more at the world (by necessity.... you meet new people, hear new viewpoints, learn of more examples as time goes by and you rank up experience after experience).
In the same way, I test my assumptions about gravity every time I jump up and fall back down, every time I drop my keys, ...
You inadvertently form models in your brain about external reality. You do this out of necessity.
And with every new relevant experience, you by necessity either validate those models or you are forced to alter them to accommodate for that new experience in case it didn't match the model in your head.
Such is a fundamentally scientific principle.
We didn't invent formal science in a vacuum.... we based it on our experience of how to best draw reliable conclusions.
In formal science, we are going to structure all these things so that we can also eliminate bias and better distinguish things like correlation vs causation and what-not.
None of this takes away from the fact that drawing conclusions from observations / experiences + validating those conclusions against future observations / experiences, are fundamental scientific principles that we ALL apply in our daily lives pretty much out of necessity.