The idea that all our perceptions are colored by our previous experiences and what we think we've learned so far is pretty powerful. All of us are indeed plagued by assumptions and the more we think about them, the stronger we tend to make them (as we're biased towards confirming them instead of refuting them since we feel connected to them already).

I guess the billion dollar question is how do you question your assumptions properly and fully when all you have to work with is your flawed brain that doesn't have the capacity to comprehend without relying on assumptions. Even the interesting arguments and points you've made here are resting on assumptions about how people think and what other people actually comprehend too. How do you combat that even when you know it's certainly there?