It's definitely not a matter of not caring. I think Art half-knew but wanted to prove himself wrong. When Picker pinned the incident on the tarmac on Agent Barkley, there was a nice tidy solution. But Art still half-knew it was Raylan, and Raylan felt the need to be as honest as he could without forcing Art to open an investigation.
The one thing that has bothered me these last two episodes though is why was Art so gung-ho in implicating Raylan in the Nicky Augustine murder? Why did he even care? Seemed out of character for him, particularly what, 6 months from retirement?
Art drew a line in the sand with Raylan after Winona was attacked last season, and Raylan violated the spirit of that ultimatum if not the letter.
I didn't interpret it as Art inviting Raylan at all. My interpretation is that that Art's a regular at that bar, Raylan knew that and showed up on his own hoping to smooth the waters, and Art wasn't up for smoothing the waters.
And what was the deal with that opening scene? "Yeah, Raylan, I was wondering if you could just come meet me out at this dive bar in the middle of nowhere just so I can punch you in the eye. Okay, see ya soon."
Pairing Boyd and the Crowes together instantly made them interesting and connected in a way they hadn't been so far this season. Man, this show's really getting it's money's worth out of Michael Rapaport's size. When he pummeled the crap out of that neo-Nazi, you could see why he's the head of the family. Even his psychopath brother wouldn't mess with him.
Dewey trying to hold Boyd's muscle for ransom and utterly failing to convey his threat due to the spotty cell phone reception was one of the funniest things I've seen in quite a while.