Percy williams bridgman quotes about change

There is no adequate defense, except stupidity, against the impact of a new idea.
-- Percy Williams Bridgman

#Science#Ideas#Impact

If a specific question has meaning, it must be possible to find operations by which an answer may be given to it I believe that many of the questions asked about social and philosophical subjects will be found to be meaningless when examined from the point of view of operations.
-- Percy Williams Bridgman

#Philosophical#Believe#Science

To find the length of an object, we have to perform certain physical operations.

The concept of length is therefore fixed when the operations by which length is measured are fixed that is, the concept of length involves as much as and nothing more than the set of operations by which length is determined.
-- Percy Williams Bridgman

#Determined#Length#Operations

The operational approach demands that we make our reports and do our thinking in the freshest terms of whi