by trial and error


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by trial and error

Describing a method by which one makes attempts towards some goal and then learns from one's failures and adjusts accordingly. Rather than doing things by trial and error, you should really read the manual before trying to fix your car's engine.
See also: and, error, trial

by ˌtrial and ˈerror

trying different ways of doing something until you find the right one: I didn’t know how to use the camera at first, so I had to learn by trial and error.
See also: and, error, trial