Just because he calls it common sense doesnt make it so.
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He means: Common Scents.
Well known to Skunks, Rats, Sewer Dwellers, . . .
Those who know the unique odor of their own ‘back hole.’
“The presidential hopeful likened assault rifles to machine guns in response, saying that society has got weapons of war off the streets in the past.”
There are no assault rifles on the street with the exception of the machine guns gangs use in drive-byes.