A theory can be proved by experiment; but no path leads from experiment to the birth of a theory. Votes: 12
In theory, there is no difference between theory and practice. But, in practice, there is. Votes: 10
A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant. Votes: 9
Sometimes a scream is better than a thesis. Votes: 7
One will only be free when one plays and one's society will become a piece of art". - Herbert Marcuse Votes: 3