Logic must look after itself. In a certain sense, we cannot make mistakes in logic.
Ludwig WittgensteinMan has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.
Ludwig WittgensteinRussell's books should be bound in two colours, those dealing with mathematical logic in red - and all students of philosophy should read them; those dealing with ethics and politics in blue - and no one should be allowed to read them.
Ludwig Wittgenstein