When something has a logical connection or consistency it is said to be?

There are a few words that describe something with a logical connection or consistency, depending on the specific nuance you want to convey:

* Cohesive: This word implies that the parts of something fit together well and form a unified whole.

* Coherent: This word emphasizes the logical flow and clarity of thought or argument.

* Consistent: This word implies that something follows a set of rules or principles and does not contradict itself.

* Logical: This word emphasizes the use of reason and sound judgment.

* Rational: Similar to logical, this word emphasizes the use of reason and evidence.

* Sound: This word is often used to describe arguments or reasoning that are logically valid and well-supported.

The best word to use will depend on the specific context. For example, if you're talking about a well-written essay, you might say it's "cohesive" or "coherent." If you're talking about a scientific theory, you might say it's "consistent" or "logical."