You can never underestimate the stupidity of the general public.
Sentiment: NEGATIVE
Never underestimate the power of human stupidity.
You mustn't underestimate an audience's intelligence.
You must never underestimate your opposition.
It is impossible to underrate human intelligence - beginning with one's own.
There is no such thing as an underestimate of average intelligence.
You can't legislate against stupidity.
It is always dangerous to underestimate anybody.
Don't overestimate the decency of the human race.
The public's not stupid.
The public are not stupid.