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pg 114, Scholastic Mage quality
Cost: 1 Karma or 1,000 nuyen per Knowledge skill
Game Effect: During character creation only,
mages can buy Knowledge Skills for 2 Karma
each. They can also buy Knowledge skills with
their starting nuyen (p. 68, SR6) at a cost of 1,000
nuyen per Knowledge skill.
Inconsistent Karma cost
Yeah I spotted that one and it confused the heck out of me. So it's a Positive Quality with a cost that gives a discount, but that cost kind of sounds weird? What I would SUSPECT it means is 'you pay 1 Positive Quality karma or 1k nuyen, plus 2 normal karma / 1k nuyen, for your knowledge skills'. If you pay 1 karma from the quality perspective, it counts for the (max 20 net karma) rule, while the karma spent on the normal buy doesn't. But then what about knowledge skill freebies, do those cost extra as well, so you pay karma or nuyen on the freebies, in return for a possible discount on any extra ones? It's just weird and I can't even establish a likely RAI.
On further readings I bothered to look up Starting Nuyen (pg 68 CRB) which references the 'no more than 5000 nuyen to start the game' rule, so it sounds like the only time you're allowed to spend nuyen for knowledge skills in this way is right at the end of character creation with that leftover lump of cash. This is an out-of-turn spend (qualities step 3, starting cash step 6) which makes it even more awkward.
The karma cost reads more like a mistake rather than 1 karma to unlock a discount.
Anyway if the author looks that over and thinks "yeah this is good as is" they need their head checked.
Well, like so many other things, it can be read in numerous ways. Syntactic ambiguity strikes again!
I think you can choose to read it as:
you pay 1 karma for the privilege of buying a knowledge skill at 2 karma, for a net 3 cost... which is a waste because that's what they cost anyway.
or you can pay 1000 karma to buy a knowledge skill at 2 karma instead of 3. Not a very good deal, but it's better than "buy one for the price of one!"
Or, you can choose to read it as:
you pay 1 karma to lower the price of all knowledge skills you buy to 2. So if you only buy 1 KS, it's still a wash at 3 karma. But if you buy 3 knowledge skills, you're paying 1+2+2+2=7 instead of 3+3+3=9. It's a slight bargain, but hey the quality only costs 1 karma, so what do you want?

Alternately, instead of paying any karma at all, you can pay 0 karma and 1000 nuyen per knowledge skill... so buying 3 would cost you 6 karma and 3,000 nuyen.
Recap:
the quality either costs
1 karma per knowledge skill, or 1000 nuyen per knowledge skill
_or_
1 karma total, or 1000 nuyen per knowledge skill.
When a rule only makes sense (or works at all) when you read it one way but not the other... I find it's better to just go with the reading where it works
