oren wrote:I'm guessing for the level of class
It was for an audience from ca. 15k - 6d with a majority of 5k - 5d.
Kirby wrote:But it's OK if the principle is sometimes wrong, is it not? [...]
When a pro says "first reduce, then occupy the vital point", it doesn't mean that the student should be a robot and always follow this advice.
A principle, unless designed to be 100% correct, may sometimes be wrong, say in the 5% range of being wrong. However, 1) the specific "principle" in question is wrong much more often in practice and 2) the teacher of a principle must explain the (low degree of) reliability of a principle.
Students still need to think for themselves, and such sayings should be used as starting points
The result of thinking for myself is: there are ca. 200 (if not more) instead of 2 (reduction, vital point) techniques for local life and death problems; the appropriate principle about reductions and vital points is "It is more often correct to use reductions before occupying vital points, but the converse order must be considered as an alternative. This has to be applied in the context of many possible other techniques.".
When you reduce the game of go to a set of principles that cannot be broken,
Uh, I expect this not earlier than 400 years later...
The purpose of examples and principles is to point a general direction
In case of examples: if only this were always so...
and to give students something to think about
Exactly. Therefore, proverbs must not be called principles and must not be misleading.
You seem to define the quality of a teacher by their adherence to truthful and universal principles.
No. (E.g., principles are only one aspect of teaching. An important aspect of teaching is identification of the pupil's systematic mistakes.)
some may very well learn better from examples and "semi-truths"
IMO, even they can learn better with the accompanying characterisation, that a statement is just more frequently correct than wrong, instead of giving the false impression of being a truth. Even more important, also they can learn more if they are told about more techniques than always only reductions versus vital points. (I have seen several such professionals teaching only the reductions before vital points idea and otherwise only examples. Needless to say, the literature and go theory about life and death need a revolution, so that teaching on the topic can become better than "Take that pile of problem books and solve them!".)