But if the words you use are too general, imprecise or altogether wrong, your thinking will necessarily be sloppy. That's a sweeping statement and may not actually be what you mean. You may really be thinking of one particular supplier and one particular instance of undependability. But in your haste or anger you generalize. To think effectively, you must use precise words.
Rigidity is just as bad as generalizing.
Beware of becoming too orderly in your thought processes. In order to think originally, you must be willing to allow your mind to wander, to strike out on its own, to go off on tangents, to play with various possibilities. Talk it over. Find someone with whom you can exchange views. In effect, you will be thinking out loud, and the opportunity to hear your thoughts sometimes provides new insights.