Formal:
* "If the court finds the defendant guilty of robbery, then a fortiori, he must be found guilty of theft, as robbery includes theft as a component." (Here, "a fortiori" means "with even stronger reason.")
* "Since the company failed to meet its sales targets in the previous quarter, it is a fortiori likely to fail to meet them in the current quarter, given the current economic downturn." (Here, "a fortiori" emphasizes that the situation is even more likely to be true now.)
Informal:
* "If you can't afford to buy a new car, then a fortiori, you can't afford to buy a new house." (Here, "a fortiori" emphasizes that the second action is even less likely than the first.)
* "If the team lost the game against the last-place team, then a fortiori, they are going to lose against the first-place team." (Here, "a fortiori" suggests the second outcome is even more probable.)
Key Points:
* "A fortiori" is used to strengthen an argument by showing that if a weaker proposition is true, then a stronger proposition is even more likely to be true.
* It's often used in legal arguments, academic writing, and debates.
* While it is generally considered formal, you can use it in informal situations to emphasize a point.
Remember, "a fortiori" is a Latin phrase, so it's best to use it sparingly and ensure it's appropriate for your audience.