Here are the possible solutions for english logician with a diagram named for him clue
Answer
Clue
Relevancy
venn
Clue
English logician with a diagram named for him
Logician John for whom a diagram is named
___ diagram (logician's tool)
English logician John
neko
Clue
Rocker Case who tweeted "If a dude called me a 'cougar' I'd be more likely to kill him bare-handed and shit him out in front of his parents than fuck him"