Could we learn blue magic second hand?

[Iscah]

Given that the takeaway from the spoilered text in this post is, YES, a BLU can learn spells from other BLUs, the question might arise as to why Martyn doesn't just set the WoL down and cast Blue Magic until he's passed on everything he knows?

Clearly he just doesn't want to be beaten up repeatedly as a necessary part of the learning process....