Explanation: A hypothesis is discarded when the results do not work out, and it contradicts.

When should researchers discard their hypothesis?

A researcher should discard data when the validity of data is compromised. However, the researcher is ought to be able to clearly state how many participants' data were discarded and the valid reason for it in one's final report.

Why do scientists sometimes discard theories?

Theories are discarded because scientists are making advances in their pursuit of knowledge. Thus, discarded theories are often a sign of the good health of science.