Short term capital

From where the short term loss arrived at? 

If intraday, any loss can be set off with speculative business profits.

If F&O loss, can be set off with any other non speculative business profits.

But if capital loss, can be set off only against any capital gains, but not with business profits.

If intraday, any loss can be set off with speculative business profits.

If F&O loss, can be set off with any other non speculative business profits.

But if capital loss, can be set off only against any capital gains, but not with business profits.