Partial literacy in Sorceror's Tounge

[hcobb]

Wizards are taught the basics of Sorceror's Tounge in their training so whataboutism -2 DX for each IQ point below IQ 17 when casting a spell from a book written in this if the wizard hasn't spent a memory point to learn spell or tongue?

As with scrolls that -2 makes IQ trump over pure DX plays.