"Common sense" is the term used to explain that you should trust your own unrelated experience when faced with something you don't understand, rather than trusting to the people who literally spend their lives seeking to understand and explain something.
So common sense tells you that you should build an entire plane out of the material used to make the Black Box, because then if it crashed it would remain intact . . . nevermind that it would be too heavy to fly. Engineers are just stupid.
Common sense tells you that drinking disinfectant will prevent getting COVID because really, there is no difference between ingesting something and cleaning surfaces with it. Doctors are just dumb.
That is what Common Sense means.
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