There is a verb ''redargüir'' in portuguese, but it's something more like ''rebutting'' or merely ''answering back''.

I like that middle -d- when it crops up, also in 'redolent' and 'redact'.

It's so Ciceronian, isn't it?

Snippet view, which we all love to hate, is almost gnomic with One may redargue a presumption, but one cannot redargue a fiction.