I was thinking it was a Venn diagram, where none of the bubbles had complete intersection with the others. "This bubble represents all pilots between 5'6" and

I was thinking it was a Venn diagram, where none of the bubbles had complete intersection with the others. "This bubble represents all pilots between 5'6" and 5'11" in height. And here's the bubble that represents those with 40" chests. Note how they barely intersect."