A mythical force that is supposed to bestow knowledge of the obvious. Unfortunately, humankind has proven, time and time again, that there is no such thing as common sense.
The People v. Common Sense:
Common sense should tell people that coffee is a hot drink, and that when spilling it, one should expect it to be hot. Common sense should also tell people that eating fatty foods makes you fat. Still, look at the recent pathetic excuses for "lawsuits" against some fast-food restaurants.
Common sense should tell people - even children - that TV shows such as "Power Rangers" are not reality. Two eleven-year-old boys, however, tried to re-enact a scene from the above-mentioned show by burying an eight-year-old boy alive in the ground, thinking he would grow back out. Duuuuh...I don't think it worked...oops!
Common sense should tell the Bush administration to take money from people who actually HAVE MONEY TO GIVE, but instead they choose to take it from people who do not have it.
I rest my case.