Philistine
anti-intellectual
lowbrow
lowbrowed
mindless
uncultivated
Gothic
barbarous
bookless
deceived
functionally illiterate
grammarless
heathen
hoodwinked
ill-educated
illiterate
led astray
misinformed
misinstructed
mistaught
pagan
rude
unbooked
unbookish
unbooklearned
unbriefed
uncultured
unedified
uneducated
unerudite
unguided
uninstructed
unintellectual
unlearned
unlettered
unliterary
unread
unrefined
unscholarly
unschooled
unstudious
untaught
untutored