Oh, that's a Venn DIAGRAM,
The Big Bang Theory Season 9, Episode 23
In a Venn DIAGRAM,
that would be an individual located...
The Big Bang Theory Season 1, Episode 14
so this DIAGRAM is really just
a flux capacitor
The Big Bang Theory Season 11, Episode 16
"Venn is he gonna stop talking
about this DIAGRAM?"
The Big Bang Theory Season 9, Episode 23