## A Common Principle of Boolean Algebra as Stated in George Boole's 'Mathematical Analysis of Logic':

A Common Principle of Boolean Algebra: *xy* = *y*

A Common Principle of Boolean Algebra: *xy* = *y*

The Syllogism Stated:

Premise 1:

Socrates is a man.

Premise 2:

All men are mortal.

Necessarily Inferred Conclusion:

Socrates is mortal.

The Syllogism Stated in Terms of Set Theory:

Let:

*S*

equal the...