The forming of general maxims from particular observation is a very nice operation; and nothing is more usual, from haste or a narrowness of mind, which sees not on all sides, than to commit mistakes in this particular.
Mind is a machine for jumping to conclusions
Everybody generalizes from one example. At least, I do.
I often wonder why the whole world is so prone to generalise. Generalisations are seldom if ever true and are usually utterly inaccurate.
Generalization, especially risky generalization, is one of the chief methods by which knowledge proceeds... Safe generalizations are usually rather boring. Delete that "usually rather." Safe generalizations are quite boring.
Given a thimbleful of [dramatic] facts we rush to make generalizations as large as a tub.
I wouldn't want to assume that all men are like you. If I did, I know I would give them up entirely
I had ... come to an entirely erroneous conclusion, which shows, my dear Watson, how dangerous it always is to reason from insufficient data.
Persons not habituated to reason often argue absurdly, because, from particular instances, they deduce general conclusions, and extend the result of their limited experience of individuals indiscriminately to whole classes.
An extra-terrestrial philosopher, who had watched a single youth up to the age of twenty-one and had never come across any other human being, might conclude that it is the nature of human beings to grow continually taller and wiser in an indefinite progress towards perfection; and this generalization would be just as well founded as the generalization which evolutionists base upon the previous history of this planet.
Every generalization is dangerous, especially this one.