The key to winning arguments is to have a basis in fact.
Everything that lives is based on the earth.
foundation or basis (the manga is based on the anime which was based on the videogame which was based on a true story)
to be based on xxx ★★★★☆
the basics (the emphasis is: the minimum knowledge)
Also means fundamentally (emphasizing the essential bits that various things or ideas have in common)
criterion - the basis for judging a sex partner, potential job applicant, which songs to buy, etc. Also - unlike the OTHER きじゅん （規準）、THIS きじゅん ALSO has a second meaning: 'standard', as in, standard wages, standard price, the gold standard, standard medical ethics. Metric is our standard of measurement in Japan, whereas in USA they use their own standard.
|period of time
Dupe someone with a LACK of brains.
The EARTH is fundamental to life.
A MONTH is a period of time.
The flag blows in the DIRECTION of the wind.