英 [ɒbˈvɜːʃən] 美 [ɑːbˈvɜːrʃən; əbˈvɜːrʃən; ɑːbˈvɜːrʒən; əbˈvɜːrʒən]
n. 转向；形成对立；换质法
In traditional logic, obversion is a "type of immediate inference in which from a given proposition another proposition is inferred whose subject is the same as the original subject, whose predicate is the contradictory of the original predicate, and whose quality is affirmative if the original proposition's quality was negative and vice versa".Quoted definition is from: Brody, Bobuch A.
换质(法)
... obverse 正面 obversion 换置法 obvert 正面转向 ...
... 财务报表 financial statement 折算 obversion; convert 外币报表折算差额 translation reserve ...
... obverse 质换式 obversion 质换 obvertend 被质换式 ...
转向；形成对立；换质法