you could play the center in the scrimmage on the PG position, with no subs and train passing for PG...
okay it's not ideal, but it works. I think B tries to avoid managers starting to train PG at blocking and such things, just because they have no clue what to train to start with...
(yes I know most will know this is no good, but there are other, less bad examples who aren't realy effective training types either, but this is the clearest example)
As for the GM and BB contradicting: actually they are not.
BB says: some players do not use some skills enough during the game, in order to be able to improve at it. -> see that much and often enough
GM says: no skill is completely useless. Which implements some skills are not used often, however they are used once in a while...
I'd say they say the same thing basically.
What the BB says is that for those skills they do not use that often, they get no training, because they simply don't use them often.
And before anyone goes trowing with games where a center had 7 assists, and a PG had 4 blocks and all that, yes I know, and yes you are right, BUT...
Here in Belgium they say: trainer is always right... so here it is BB is always right. ;)
I wouldn't want them to tweak the game engine so my center doesn't give any assist, and my PG gets no blocks at all, just so you guys can't tell them anymore that they do use those skills in order to get that training! ;þ
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