The usefulness of the models in constructing a testable theory of the process is severely limited by the quickly increasing number of parameters which must be estimated in order to compare the predictions of the models with empirical results. Anatol Rapoport
Life should not be estimated exclusively by the standard of dollars and cents. Charles Goodyear
The savage repression of blacks, which can be estimated by reading the obituary columns of the nation's dailies, Fred Hampton, etc., has not failed to register on the black inmates. George Jackson
By the last returns to the Department of War the militia force of the several States may be estimated at 800,000 men - infantry, artillery, and cavalry. James Monroe
When ancient opinions and rules of life are taken away, the loss cannot possibly be estimated. From that moment we have no compass to govern us, nor can we know distinctly to what port to steer. Edmund Burke