Overgeneralization is the application of a rule to an instance that it does not apply. It can also mean using a small set of real data or non-representative data to make an inference that is simply incorrect.
every hear the phrase "tarring everyone with the same brush"?
well its the same...it means over simplifying something.
and taking a small amount of data/findings and presuming the rest are like that.
The sentence 'All dogs will bite when teased.' is an overgeneralization and dangerous to many dogs. We must take care when speak; overgeneralization can be used against the party, as well as for the party.
Overgeneralization (A+)
General statements based on only a few facts.
Overgeneralization
"All birds can fly because I saw a robin flying yesterday." This is an overgeneralization fallacy because it assumes that all birds share the same capability based on the behavior of one bird.
overgeneralization
After staying in London for a week, I concluded that most English people are snooty.
She's good at basketball, so she's probably good at all sports.
She's good at basketball, so she's probably good at all sports.
Linguistic overgeneralization occurs when language learners apply grammatical rules inappropriately, leading to errors such as "runned" instead of "ran" in English. It often happens during the early stages of language acquisition as learners try to make sense of complex rules and apply them universally.
inaccurate Observation overgeneralization selective observation illogical reasoning ideology and politics
 B. overgeneralization. Apex