QUOTE (KnightRunner @ Mar 30 2010, 02:04 PM)
Is there any source to back this up? I know it makes sense, but is there a clear RAW?
It's in RAW, but "clear" can be argued. The rules for using instructors for a skill group link you to page 134. In that page, it simply states "the instructor must also have the skill at a rating that equals or exceeds the rating the pupil wants to achive. The entry for skill groups (not quoting the paragraph, but pg. 118) provides the rest. After rereading this, I'd change my answer to you have to have tutor softs for all the skills at the level you need-- no average. The first response was from memory that I put too much stock in.
QUOTE (LurkerOutThere @ Mar 30 2010, 01:26 PM)
Errr i thought all the GM discretion stuff effectively defaults to no.
There are no optional rules, but the game has several areas where GM's decide-- see my earlier post about Spirits using Edge. If it's not banned per the SRM guidelines and FAQ, it's still canon SR4A, the GM still get's the call. However, b/c GM's differ in opinion on this, your GM can also say 'no' to used vehicles. Seeing as it's his/her call, that stands also (since there's no clear guidelines in the book in how he'd do it).
GM's use discretion constantly-- if a NPC uses edge, what tactics they use, what bonus's to give on social tests, when to require dice rolls or to just role play out tangent encounters. Or when they are forced to change the story, b/c the PC's blew up the escape chopper in Act 1 (so to speak). Although I do know GM's that would deus ex machina the chopper back, but I avoid playing with those b/c their mods are boring.