How can theories that are proved to be false still be useful in ...

[camila]

Its urgent.
im a student and i need an answer asap for my homework. Thx
and give example plz

[hummingbird]

Because without theories that are proven to be false, we wouldn't be able to prove theories to be true,

[Yolanda]

Theory is derived from the earlier proven formulae.    In sanskrit language, there are two aspects - 'samanya'  and 'visesha'.    Samanya is what we see once and again.  For example, this crow is black, that crow is black, the other crow is black.   So theory is derived as 'every crow is black'.   Of-co0urse there are exceptions and some one may claim that he has seen a white crow. But, the wise knows that it means not the crow of which we proved about.
Same way, One theory that was not proved to its extremity or entirety, but  91.6% true and proved,  could be applicable in psychology on the risk that more than certain percentage it would be useful.
Thus the most experienced Medical Officer advises "to take this tablet or capsule for 5 course and let me know the result" to escape from the promise of 100% recovery of the patient.