I guess vaccines do cause mental retardation.
Proof: Anti-vaxxers were vaccinated.
Doctor: Do you have any history of mental retardation in your family?
"Your retardation is disadvantageous. I suggest you all vamoose with great impunity."
Why was the book about working with the mentally challenged not successful?
It was called "Retardation for Dummies."
How do you get diagnosed with mental retardation?
I thought rTwoXChromosomes was a mental retardation subreddit.
The posts didn't convince me otherwise