Rule (C) is generally held to be at fault rather than any of the other logical principles employed.

Spock had not understood at the time, but now he was beginning to see the logical principle behind the metaphor.

These systems effectively give up several logical principles in practice without rejecting them in theory.

Second, the classification does not seem to obey any single, logical principle.

Everyone, including the newcomers, seems to be acting according to some logical principles that have yet to be discovered.

On the other hand, intelligent design does not violate any known facts or logical principles.

We do this via some concrete examples, simple enough to allow the logical principle involved to be easily seen.

It is time we returned to more logical principles, to a mixed economy like that which served us so well in the post-war years.

One such logical principle is the law of non-contradiction.

We may illustrate the systematic unity produced by the three logical principles in the following manner.