When a shrewd merchant was asked the sum of two plus two, he answered with a question. “Am I buying or am I selling?” Big difference.
Because if I’m buying, two plus two equals three, but if I’m selling, then two plus two is five.
If my car is worth ten thousand in the market, and I want to sell it to you, I will try to sell for eleven thousand (simply because I’m selling), and you will try to buy it at nine thousand, just because you are buying. Reverse the roles and we would both be asking for different prices.
Two plus two never equals four in the world of commerce. It is four on average because sometimes I’m buying and sometimes I’m selling.