a little knowledge is a dangerous thing

a little knowledge is a dangerous thing {literary}

A person who knows a little about something may think he knows it all and make bad mistakes. — A proverb.

John has read a book on driving a car and now he thinks he can drive. A little knowledge is a dangerous thing.

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Source: A Dictionary of American Idioms

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See as well

knowledge

[knowledge] See: [A LITTLE KNOWLEDGE IS A DANGEROUS THING], [TO THE BEST OF YOUR KNOWLEDGE]. A Dictionary of American Idioms

dangerous

[dangerous] See: [A LITTLE KNOWLEDGE IS A DANGEROUS THING]. A Dictionary of American Idioms

little

[little] See: [A LITTLE], [A LITTLE KNOWLEDGE IS A DANGEROUS THING], [GREAT OAKS FROM LITTLE ACORNS GROW], [LITTLE FROG IN A BIG POND], [MAKE LITTLE OF], [NOT A LITTLE], [QUITE […] A Dictionary of American Idioms

thing

[thing] See: [A LITTLE KNOWLEDGE IS A DANGEROUS THING], [DO ONE'S THING] or [DO ONE'S OWN THING], [FIRST THINGS COME FIRST], [FOR ONE THING], [SEE THINGS], [SURE THING], [TAKE IT […] A Dictionary of American Idioms

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