jump to a conclusion

jump to conclusions

To make decisions or form opinions before one has all the pertinent facts. I know you found some suspicious things in her office, but don't jump to conclusions—talk to her first.
See also: conclusion, jump
Farlex Dictionary of Idioms.

jump to a conclusion

Form an opinion or judgment hastily, as in Wait till you have the facts; don't jump to a conclusion. [c. 1700]
See also: conclusion, jump
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • jump to conclusions
  • jump to conclusions, to
  • jump/leap to conclusions
  • leap to conclusions
  • rush to conclusions
  • give (one) the low-down
  • give somebody/get the low-down
  • get the low-down
  • fishy
  • a thing or two