Spot the lie: Venn diagram facts

Exercise and reference answers

Questions

1. Reason

   'Some X are Y' shows two PARTLY (not identically) overlapping circles.

   False statement

   'Some students are athletes' shows two identical overlapping circles.

   Statements

   1. 'Some students are athletes' shows two identical overlapping circles.
   2. 'All cats are mammals' shows Cat circle inside Mammal circle.
   3. 'No fish is a bird' shows two non-overlapping circles.

2. Reason

   Venn diagrams were given by JOHN VENN, not Aristotle.

   False statement

   Venn diagrams were invented by Aristotle in ancient Greece.

   Statements

   1. 'Dog, Cow, Animal' has Dog and Cow circles inside Animal.
   2. Venn diagrams were invented by Aristotle in ancient Greece.
   3. Three disjoint persons are shown by three separate circles.