his/her argument
Su argumento es más radical que el suyo.
His argument is more radical than yours.
Su argumento era lógico.
His argument was logical.
Su argumento es lógico.
His argument is logical.
Su argumento carece de lógica.
His argument lacks logic.
Su argumento es convincente.
His argument is convincing.
— Porco Rosso (1992)