None of you can possibly say poor lookout had anything to do with this. How many times have you actually had traffic info and had several pairs of eyes looking for it and never seen it? I've had lots. And as for 'big sky' etc, this collision happened at approximately 3nm final at a full ATC radar-equipped airport, with one and possibly both a/c speaking to ATC. Not the same as a random conflict in the FIR.
NS