UFOs and Venn Diagrams
Venn Diagrams are named for English Logician John Venn [1834-1923] and devised to visually represent complex logical propositions and algebraic statements.
Here are some examples:
The properties of a Venn Diagram could be used to analyze UFO data or witness details.
And my simplistic approach to handing the UFO situation or ufology:
I’d be interested in seeing some Venn Diagrams (pertinent to the UFO phenomenon) from some of the erudite visitors here.
They can’t be inserted in Comments but if you send them to firstname.lastname@example.org, we’ll place them online in a posting just devoted to Venn Diagrams.