Correspondingly, what is the valid source of knowledge according to Charvaka?
The Charvaka epistemology holds perception as the primary and proper source of knowledge, while inference is held as prone to being either right or wrong and therefore conditional or invalid.
Beside above, how many Pramanas has Nyaya philosophy accepted? six Pramanas
Besides, how many pramana are accepted by Charvaka?
six
How many elements are considered in Charvaka philosophy?
The Lokāyata posited that the world itself and all material objects of the world are real. They held that all of existence can be reduced to the four elements of air, water, fire and earth.