He then presents a number of examples that illustrate the limits of inference without theory: the effect of unemployment benefits on unemployment duration; the effect of public welfare on women's labor market and demographic outcomes; the effect of school attainment on earnings; and a famous field experiment in education dealing with class size.
The main places where Revisionists look to see Plato managing without the theory of Forms are the Theaetetus and Sophist.
As a macro theme, I will always contend that choosing investments without a theory of choice is a dangerous way to allocate capital.
On the other hand, the Revisionist claim that the Theaetetus shows Plato doing more or less completely without the theory of Forms is very plausible.
Without theory, key aspects of cyber-dynamics can be left unexplained, unexplored or ignored in favor of broad projections.
Because this translation would not have been possible without a categorical theory of hybrid systems, the power of this theory is thus demonstrated.
But he has recently seemed more committed, appreciating, perhaps, that simply pledging improvements, without a credible theory of how they might be achieved, wouldn't wash.
But without an overarching theory of quantum gravity, similar to what Einstein offered for the visible world, quantum foam remains one of many cosmological puzzles.
"Young man," said Doc, "do you think you could teach biology without teaching the theory of evolution?" "Why, I don't think so," the young teacher replied, and he went back to playing tennis.
And without a basic theory of fraud there can be no legal charge to pursue against the managers of the MBS-trading banks, even before grappling with problems of managers' lack of knowledge and direct involvement in trades.
