be intelligible

See: cohere
References in classic literature ?
You are an extremist, you know, dear, and what may be intelligible to you may not be intelligible to the rest of us.
At least peace of mind comes in the fact that communication through music is a language that cannot be turned into text-speak and does not lend itself to any other form of 'simplification' --it requires, just like the words you speak, to be intelligible, logical, and from the heart--telling the story and not just speaking the words.
There is no explicit reference to intelligible matter here, but given that forms are intelligible objects "the matter of the form" will be intelligible matter.
But the rate should be intelligible to the audience and slow enough not to reveal nervousness.
is productive and, second, that we should expect productive discourse to be intelligible.