Quote Originally Posted by PaulTB
But if you look at the definitions of argument you will see (among others).

A course of reasoning aimed at demonstrating truth or falsehood: presented a careful argument for extraterrestrial life.
The debate (argument in Japanese) over capital punishment :
死刑についての討論　

Arguments/Reasons for and against (grounds in the Japanese context under discussion here)
論拠

Basis for those arguments (grounds for/on in English)

（論拠）の根拠

Clear enough to everyone ?