Sentence:  With all these dilemmas and <WSD>trilemmas</WSD> crowding the mind, if one did not "know" better, one might be tempted to doubt whether any such versions were ever made at all. 
Meaning of the word marked with <WSD> tags:  A circumstance in which a choice must be made between three options that seem equally undesirable or, put another way, in which a choice must be made among three desirable options, only two of which are possible at the same time.