Whenever you read that one thing is associated with another your mind makes an intuitive leap and its not just your mind. Most minds do this and they do this so often and so naturally that it is hard to notice. Your mind takes the data that I read you and smoothly glides to the conclusion that one of the two things must be causing the other. After all, smells are usually caused by something, not the cause of something. So your mind gently arrives without your even noticing it at the conclusion that the pool smell is caused by chlorine. It makes intuitive sense in fact you probably know the smell as the chlorine smell. But is that conclusion true?
George Zaidan from Ingredients: The Strange Chemistry of What We Put in Us and on Us















