I know the rules in Chicago Manual, etc. for using hyphens with prefixes (generally it's not done, except for certain circumstances). However, there is a context I have not seen addressed anywhere. When you have a compound term like

Both the prefixes un- and in- carry the sense of ... used for negation after the start of the 20th century? Well, there's "innumerate/innumeracy", based on "illiterate/illiteracy" (first OED citation, 1959). And then

Acceptable in published work and acceptable in Scrabble are very different things. True. I would assume any Scrabble dictionary is very much proper a subset of English. One wouldn't think so, judging from the comments made by passers-by on

(snip) General Principle 1 Do not use a hyphen unless it serves a purpose. If a compound adjective cannot be misread or, as with many psychological terms, its meaning is established, a hyphen is not necessary. I maybe a quarter-agree

I've recently learned that the American Psychological Association publishes style-guidance works. The home page for that topic is http://www.apastyle.org/ , ... . I especially like the latter source because it agrees in general with the things