14. Optical Illusions

ie by which something appears to be what it is not.

Examples

i) What do the words in the triangle say?

(source: Businessballs, 2023)

ii) read all the words in the box and count how many times the letter 'f'' or 'F" appears

(source: Businessballs, 2023)

The letter F appears 7 times in the box; people commonly count 6 and fail to see the last but one 'f".