common sense

Common sense is a large topic. I tend to agree with Ann Rand on this topic that a trend in philosophy trickles down to everything else. . (E.g. With Rousseau's Anti-Reason Anti-Enlightenment ) Here also the general trend of Western philosophy was to look at anything that was common sense as being by definition not possible.
In American and English thought only the counter intuitive is considered true.

This is a sad development in philosophy starting from David Hume and continuing in the Anglo British school. I would welcome a return to common sense in the world.
Hume starts out with a simple mistake that has plagued philosophy since his time. He asks for a idea that is not based on the senses. He says if one could find such an idea it would disprove him. Then he finds this idea. Then he says it is meaningless instead of admitting his mistake.
That is not his only mistake.There is also his completely arbitrary claim that reason does nothing but perceive  contradictions. Where he gets this from is simple. He saw Euclid and was impressed so he decided philosophy had to follow the same path. In any case his claim is stupid and arbitrary.It is true that Euclid builds his system by means of simple axioms and then uses reason to perceive contradictions --but also he uses reason to build up claims and ideas that are ot based on simply perceiving contradictions. So Hume did not even understand Euclid.

On a separate topic here is an essay about another issue that Hume got confused in;