trial-and-error

Adjective
  1. Trying out various means or theories until error is satisfactorily reduced or eliminated (synset 300863552)
    "he argued that all learning is a trial-and-error process that resembles biological evolution"
    similar to: empiric, empirical - derived from experiment and observation rather than theory
  2. Relating to solving problems by experience rather than theory (synset 300093961)
    "they adopted a trial-and-error procedure"
    similar to: heuristic - of or relating to or using a general formulation that serves to guide investigation

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