"The meaning of 'real' is not a fixed one, but depends on the context."

"Everything we call real is made of things that cannot be regarded as real."

"We are all agreed that the only way to escape from the paradoxes of quantum theory is to give up the idea of a 'classical' description of reality."

"We are suspended in language. Our task is to communicate experience and ideas to others."

"When we speak of the electron, we are not speaking of something that really exists, but of something that we have imagined."