Poet Bob Grumman [in a suddenly missing blog post] uses the subject of one-letter words as an example of a "knowleplex," defined as a "reasonably coherent unified knowledge, practice, use and understanding of some subject."  There are five kinds of knowleplexes; which would you guess describes our own dictionary of one-letter words?

1. Academically-Approved Knowleplexes (by 90% of academics)

2. Academically-Tolerated Knowleplexes (insufficient data to approve or disapprove)

3. Academically-Unexamined Knowleplexes (too trivial)

4. Academically-Disapproved Knowleplexes (by 90% of academics)

5. Academically-Denounced Knowleplexes (considered a significant danger to right thinking)