The statistical distribution of understanding basic logic is painfully accurate! At both extremes of the IQ bell curve, people are like "IDK if A or not A is true" while the middle-brain folks confidently assert "A or not A is true for all A." This is literally the law of excluded middle in logic—something MUST be either true or false!
It's the perfect representation of horseshoe theory in intelligence—where the super low and super high IQ people somehow reach the same confused conclusion while the average person gets it right. Those 68% in the middle smugly understanding basic Boolean logic while the outliers are questioning reality itself!