Instead of art I have taught philosophy. Though technique for me is a big word, I never have taught how to paint. All my doing was to make people to see.
There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.
The only thing we don't do together is get in front of an actor and show any indecision at all about what we think. We don't always agree, so we meet privately, then one or the other will approach the actor.