trial-and-error

Definitions of trial-and-error
1

adj relating to solving problems by experience rather than theory

“they adopted a trial-and-error procedure”
Synonyms:
heuristic
of or relating to or using a general formulation that serves to guide investigation

adj trying out various means or theories until error is satisfactorily reduced or eliminated

“he argued that all learning is a trial-and-error process that resembles biological evolution”
Synonyms:
empiric, empirical
derived from experiment and observation rather than theory

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