1. Make your contribution to the conversation as informative as necessary.
2. Do not make your contribution to the conversation more informative than necessary.

1. Do not say what you believe to be false.
2. Do not say that for which you lack adequate evidence.

Be relevant (i.e., say things related to the current topic of the conversation).

1. Avoid obscurity of expression.
2. Avoid ambiguity.
3. Be brief (avoid unnecessary wordiness).
4. Be orderly.