Not sure if it's been covered; but the Summoner, Black Mage, and Scholar quests all deal with you learning techniques recovered from ancient tomes that are being 'deciphered' by your quest giver (with the 50~60 SCH stuff being taught to you directly). That says to me a soul stone isn't required to learn the abilities or use them; outside the implications from the BLM stuff that using Black Magic without the stone will
My life is a chip in your pile. Ante up!
