Significance of Four basic schools
In Tibetan Buddhism, the term Four basic schools denotes two significant aspects. Firstly, it refers to the four prominent schools represented by monks invited by King Yashas for a miraculous challenge involving a wooden throne. Secondly, it categorizes philosophical schools within the eternalist perspective, which interpret existence differently. Similarly, in Dharmashastra, the Four basic schools relates to various philosophies regarding the nature of 'good', with the exception of the fifth philosophy, Siddhanta, which is overlooked.
In Finnish: Neljä peruskoulua; In Spanish: Cuatro escuelas básicas
The below excerpts are indicatory and do represent direct quotations or translations. It is your responsibility to fact check each reference.
Buddhist concept of 'Four basic schools'
The "Four basic schools" in Buddhism symbolize the four significant philosophical traditions introduced by monks during King Yashas' miraculous challenge, each offering distinct interpretations of existence from an eternalist viewpoint.
From: Blue Annals (deb-ther sngon-po)
(1) The four prominent Buddhist schools represented by the monks invited by King Yashas for a miraculous challenge involving a wooden throne.[1]
Hindu concept of 'Four basic schools'
The Four basic schools in Hinduism encompass diverse philosophies on the nature of 'good', omitting the fifth school, Siddhanta, which indicates an incomplete representation within the broader spectrum of Hindu philosophical thought.
From: Manusmriti with the Commentary of Medhatithi
(1) Refers to various philosophies concerning the nature of 'good', though it is noted that the fifth—Siddhanta—is ignored.[2]