A speaker uses Inventio when he or she begins the thought process to form and develop an effective argument.

Distinguishes which points are crucial to an effective argument.

Perhaps their most effective argument, though, was that Switzerland would soon be flooded by immigrants.

"I think they were very effective arguments, from a defense perspective."

A more effective argument, on the other hand, can (or so it seems) be constructed in support of the materialist theory.

In his view, the state could have made more effective arguments defending the law.

Arguing the impact's uniqueness is an underused but effective argument.

"Character is a surprisingly effective argument among historians," she said over lunch recently.

Sir Humphrey is nervous: by his own admission, he can find no effective arguments against the proposal.

But we might suppose it impossible to provide an effective global argument of this type.