Is there anything left of the ISC's reputation after yesterday?

A major plank of the Government's case against holding an Independent Public Inquiry is that the ISC committee has already looked at everything, and that is sufficient.
Listen to the attack dog's robust defence of the ISC here from last night's C4 news...

Now listen to Paul Murphy, Chair of the ISC demonstrate his grasp[sic] of the brief on last night's newsnight.
I can't quite work out if he is saying that his committee was not given the full facts about the identification of MSK, his committee failed to understand the information it was given, or was lied to by the securuty services.
I suspect the wriggle defence will be that by 'Identified' - Murphy will claim he meant identified as being on the list of primary terrorist targets, but that does rather leave one wondering how someone can be on the list of primary targets before they have been identified...

Finally, listen to Mrs Rachel North and Paul Lever, former chair of the Joint Intelligence Committee destroy what is left of the reputation of the ISC.

Now, if you haven't already...