I do not hold to the opinion that theoretical reasoning is the proper method of combating crime.

His focus was combine experimental methods and metallographic observation with theoretical reasoning, in a deductive way.

Practical actions may not necessarily be produced by highly theoretical reasoning or by complex sequences of intellectual operations.

They were thought to be effective based on theoretical reasoning, but there is very little evidence that antihistamines actually are effective in anaphylaxis treatment.

Economists try to answer questions like this by looking at past experiences and relying on theoretical reasoning.

(Philosophers might also supplement their thought experiments with theoretical reasoning designed to support the desired intuitive response.)

Such perception is always practical, whether or not it is followed by theoretical reasoning.

'Esoteric dichotomy alone insufficient basis for theoretical reasoning,' said Paul.

Kant was able therefore to re-formulate the basis of moral-practical, theoretical and aesthetic reasoning, on "universal" laws.

Theoretical chemistry is the study of chemistry via theoretical reasoning (usually within mathematics or physics).