Lokāyata, literally, “the extent of the world”, is rendered as “cosmology” by Bhante Sujato. He makes his case in a note to DN 1 as follows:
“Cosmology” (lokāyata) in early Buddhist texts is not, as it later became known, the heterodox school of materialism. Rather, it was a branch of worldly knowledge within regular Vedic studies concerned with the nature and extent of the world and how this may be known (AN 9.38, SN 12.48).
SN 12.48 has the following to say about lokāyata:
“Mister Gotama, does all exist?” “‘All exists’: this is the oldest cosmology, brahmin.”
“Then does all not exist?” “‘All does not exist’: this is the second cosmology.
“Well, is all a unity?” “‘All is a unity’: this is the third cosmology.
“Then is all a plurality?” “‘All is a plurality’: this is the fourth cosmology.
My question is, is this line of questioning best called “cosmology”? Or might it be better to call it “philosophy”?
My question is motivated by my trying to properly render the following passage from the Vinaya Piṭaka:
At that time the monks from the group of six were learning cosmology (lokāyata). People complained and criticized them, “They’re just like householders who indulge in worldly pleasures!” The monks heard the complaints of those lay people and told the Buddha.
“Is there any growth and fulfillment on this spiritual path, monks, for one who sees cosmology as the essence?”
“No, Sir.”
“Would anyone who sees this spiritual path as the essence learn cosmology?”
“No.”
“You shouldn’t learn cosmology. If you do, you commit an offense of wrong conduct.”
The monks from the group of six taught cosmology. People complained and criticized them, “They’re just like householders who indulge in worldly pleasures!” They told the Buddha.
“You shouldn’t teach cosmology. If you do, you commit an offense of wrong conduct.”
The context suggests to me that lokāyata here must be broader than cosmology. First, lay people complain, saying that this is the sort of thing that householders indulge in. It is no doubt commonplace for householders to philosophise, but less clear that they would indulge in cosmology or cosmological speculations. Second, we have the argument used by the Buddha that lokāyata is not compatible with a proper understanding of the Dhamma. Again, it seems to me that philosophical speculation is more to the point than cosmology.
Any thoughts, anyone? Bhante @Sujato, are you able to through a bit more light on your rendering, please?