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## Karika 89
If the success of *devaagama* (divine knowledge) and *saayatmika pourusha* (human effort) is attributed solely to *pourusha* (human effort), then *pourusha* would be considered infallible in all beings. In such a scenario, no one's *pourusha* would ever be rendered fruitless (due to the absence of any other hindering cause). However, this contradicts direct observation. We witness that even those who exert equal *pourusha* experience varying outcomes, with one succeeding while the other fails. This inconsistency exposes a flaw in this belief.
If it is argued that *pourusha* is of two types - one guided by right knowledge (*samyaggyaan*) and the other by false knowledge (*mithyaagyaan*) - and that while *mithyaagyaan* based *pourusha* may be flawed or unsuccessful, *samyaggyaan* based *pourusha* always succeeds, then this argument is also flawed. This is because even in *samyaggyaan* based *pourusha*, the Charvaka school of thought observes flaws in the material causes of success. For instance, even with complete knowledge of the factors contributing to a successful harvest, some farmers may still fail to achieve it.
Furthermore, the knowledge of unseen causes (invisible factors) is impossible for those with limited knowledge. Therefore, their *pourusha* cannot be considered effective. If we accept the possibility of acquiring such knowledge through inference or other means of proof, then two possibilities arise: either the unseen cause is a specific aspect of causal power or a specific aspect of merit and demerit (karma).
If we consider it a specific aspect of causal power, then even with complete knowledge of this specific power, *pourusha* can still be flawed. For example, even with complete knowledge of the specific medicinal power required to cure a person with a weak constitution, the effort of administering the medicine may still prove ineffective. This does not establish the infallibility of *pourusha* in all beings.
If we consider the unseen cause to be a specific aspect of merit and demerit, then it implies the assistance of fate (divine intervention).