Done and dusted. My recollection is that somebody managed to insert a fourth category which rendered the trilemma into a quadrilemma. So instead of Jesus being Mad, bad or right we have Mad, bad, right or wrong. However the principle still holds and that choice exists no matter how many euphemisms for being Mad, bad or right you put in....or you can prove me right on other things by 'dodging' the issue entirely.
On the other hand when one looks at the range of another alternatives they pretty much reduce to being Mad, bad, right or wrong. I think many atheists here think that Jesus was either a bad misleading character or at least a bit cracked by sincerely believing he was who he spoke of himself as.
I would also imagine that if it was wrong of Lewis to miss out the option of taking out the choice of Jesus being wrong. It's also wrong of his detractors to take out the option of Jesus being who he is claimed to be.
If there was anything I've left out here please feel free to include it.
Nope Vlad - there are many, many other categories even if we accept the basic premise (which is completely unsubstantiated - more of this below. So we can add 'misunderstood', 'misrepresented', 'mistranslated', 'not making claims meant to be taken literally' etc, etc, etc. All are, of course, much more plausible than the dishonest and incomplete list that Lewis wants us to restrict ourselves to.
But, and this is a huge but, the basic premise in the trilemma is based on an assumption that Jesus claimed to be god. We have no evidence whatsoever that he did - all we have are writers writing decades later, who were not there at the time, claiming that he claimed to be god. And even that is disputed. So at best all we are realistically left with is the notion that people other than Jesus claimed he was god. So the trilemma (or multi-lemma as it should be) really only applies to those writers and not to Jesus himself (as we do not know what he actually said or what he actually claimed). So are the late 1stC, through to the 4thC writers correct (in other words that Jesus was god), mad, bad, or mistaken on the basis that the claims didn't happen but arose as traditions and legends over time through mistranslation, misrepresentation, misunderstanding, hyperbole, deliberately made up etc etc.
So not the trilemma is a pile of junk. For Lewis to posit it suggest that he was either thick (unable to understand its limitations), deliberately dishonest (he understood its limitations but dishonestly proposed it anyway) or deluded (so blinkered in his beliefs that he could not get beyond his faith-based presumptions that the claims in the bible are true and accurate).
So there you go - a much more robust trilemma for us to get our teeth into - Lewis - dim, dishonest or deluded.