in my science class i always learned that, we have to check everything. This was a key element in every experiment. They same element occurs in the science done by famous scientist. One things he invented something and then a second scientist by doing an experiment proves that the first scientist was wrong. Consequently if you ask a scientist: "why does a pencil fall". Then he will replay by saying: " well, according the experiments we have done and checked. We could conclude that everytime there was a certain force pulling the pencil down. This force we called gravity". This explanation is crucial. Because when you ask the same question to a psuedo scientist, he would reply by saying: "well, it falls because it already falls for more then 500 years.

secondly another characteristics wich distinguishes psuedosciences from hard science is that scientist encourges you to disprove their theories. However a psuedo scientist would ask you why you would disprove a someting that is already working for more than 500 years.