«فالمعدولة: ما يكون فيه حرف السلب جزء من الموضوع، أو من المحمول، أو كليهما»
A metathetic proposition is one in which the negative particle is part of the subject, or the predicate, or both.
Negated subject: the negative component belongs to the subject term.
Negated predicate: it belongs to the predicate term.
Both terms negated: it belongs to each side.
In all three cases negation helps form a complex term. It need not mean that the entire predicative relation is itself being denied.