a fortiori
a fortiori 〈拉〉更加；更有理由 该词用于逻辑学中以说明一种论证方法：即由于某一确定事实的存在，则包含于其中或与之相类似的另一事实除特殊情况外，也必将存在。例如，任何个人在无逮捕证的情况下，可以逮捕其有合理理由怀疑犯有可捕罪的人，治安官员更加有理由如此。
A FORTIORI
a fortiori
a fortiori (ay for-shee-or-Ior ah for-shee-or-ee), adv. [Latin] By even greater force of logic; even more so (if a 14-year-old child cannot sign a binding contract, then, a fortiori, a 13-year-old cannot). Cf. A MULTO FOR-TIORI.