self-consistent

Suppose further that this field is internally completely logical, completely coherent, completely self-consistent.

I have rarely seen a person more devoted to duty or more self-consistent in all that she says and does.

On the whole the chronology of Beowulf is self-consistent, but there are one or two discrepancies which do not admit of solution.

(C) That if He is so, and if His will is self-consistent, all natural causation must needs appear to us 'mechanical.'

No writer, from Plato downward, was ever perfectly self-consistent; it would be strange if Edwards were so.