HINT: The letters I gave were grouped in a particular way, using a particular criterion. If I had used a different font…one with serifs, let’s say…the groupings would have been totally different…
Here are the groupings once again…
DO
B
PQ
CGIJLMNSUVWZ
AR
EFTY
HKX
ANSWER: Notice that one of the keywords I gave was “topology”. That’s it. The letters are grouped based on topological similarity.
Many Worlds Theory 