The justification in On Intelligence is what I'm talking about wrt words being "separated at most 1 em." Contrary to what Gruber says, there are no "unsightly g

The justification in On Intelligence is what I'm talking about wrt words being "separated at most 1 em." Contrary to what Gruber says, there are no "unsightly gaps between words" because there is a maximum distance of 1 em between words, after which it favours ragged right.