incorrigible?

[sagehen]

"It is just inconceivable & truly incorrigible that in the midst of the
war, that the Democratic leaders would be conducting guerrilla warfare on
American troops," said Representative Joe Wilson, Republican of South
Carolina, about potential legislation aimed at creating an independent
sommission to investigate detainee abuse at Guantánamo.
(quoted in /The Progressive/ Aug 2005  "No Comment")
 I can't decide what the speaker was aiming at with
"incorrigible:"....incredible? unintelligible?
A. Murie