Argument

[Jellybaby]

¿Cómo se dice...?

"That's not a good argument or reason to not do it. You could use that argument for lots of things."

"Eso no es un buen argumento/una buena razón de no hacerlo. Podrías usar ese argumento para muchas cosas."

[poli]

Argumento can used to mean pretext or reason (pretexto ) in Spanish . It can also mean plot or theme. For example: ¿Cuál es el argumento de la novela?

As far a I know, it never means a fight as argument sometimes does in English.

By the way, I would not use argumento de no hacerlo. Instead of de, try para.

Sometimes little words like de and para get us in trouble, and I would wait for a native speaker to verify this correction.

[chileno]

"Eso no es un buen argumento/una buena razón de no hacerlo. Podrías usar ese argumento para muchas cosas."

Poli is right....

Now, argument = discusión in the same sense of having a verbal fight