We have the tendency to let emotions rule reason. Humans have difficulty in separating emotions from observations and understanding that give us false impressions of the truth based on our feelings at the time. For example, I have been cut off by someone in traffic; I lost it, chased after the offending driver of vehicle, and cut them off, stop the vehicle and yell at the person, I clearly have let emotion cloud my better judgment and understanding.
Our senses are dull and are easily deceived. We like to discern or even impose more order in life than is actually needed. This arises perhaps from affection we begin to give to ideas we have found and carried with us for some time; we become attached to them and collect evidence that supports them while throwing out that which contradicts them. Of course, this will lead us to false conclusions if we have accidentally embraced a false "truth." Science faces this problem all the time: in the attempts to find scientific evidence for curing diseases. Scientists often tend to find data that fits whatever conclusions they were expecting, whether or not it was the most accurate analysis of data. This is problematic because this is considered to be “soft" data, not truly factual.
Education falls into the large influence on an individual's perception of the world around them. Unfortunately, the false realities of the educators, books, etc. can get