[TFEX]

People will be able to enter the forum, even if they do not pass the quiz.
They will not be able to post if they do not pass.

Yeah I gathered that already from this:

p.s. If you want your users to have to pass the quiz before they can even read in your forum, copy the plugin code from newthread_start and create new plugins using forumdisplay_start and showthread_start as the hooks with the same source code.

I haven't tested that, but it should work.

Although I have no idea how to go about implementing it... it will be the hurdle I undertake after I get it working.

It seems that there is only a reference to the phrase, but not the phrase itself. The only phrase that this mod seems to add, is quizID prase.

quiz_failed is also not there.
Maybe these phrases once where in Inferno Quiz.

Interesting, so what you are saying is you've never solved the issue then? I'll have a look for those references in the plugin code and see what removing them altogether accomplishes, or possibly changing the reference to whatever similar phrase is currently used in Inferno. Would seem like the next logical step to take...