Answer
It makes sense.
Work Step by Step
It makes sense. Clearly, the words 'rational' and 'real' as used in mathematics have different meaning from the used in everyday speech.
Everyday meaning is as follows:
"Be rational" usually means “be reasonable” or “think logically.”
"Get real" is a slangy way of saying “be realistic” or “stop being ridiculous.”
In the cartoon:
i says to π: “Be rational” — which is ironic because π is irrational in math.
π replies: “Get real” — which is ironic because i is imaginary, not real.
So both characters are using math terms as insults, and the punchline works on two levels: logic and math.
