Applied Philosophy

One plus one equals zero
Fuel and a match are nothing

One plus one equals one
Water and water is water

One plus one equals two
A man and another man are two men

One plus one equals three
A man and a woman are parents to a child

One plus one equals four
A product of two lines is a square

One plus one equals five
A line on a square makes a pyramid

One plus one equals six
A man and his peacemaker are six shots

One plus one equals seven
And one man in his time plays many parts,
His acts being seven ages.

I could go on, but Shakespeare seems a good point to stop.