Danny DeVito sat down for a lie detector test with Vanity Fair recently and shared some opinions about the different Batman movies over the years. The It’s Always Sunny in Philadelphia actor’s daughter, Lucy DeVito, asked him some questions once he was hooked up to the machine.

Showing him a photo of Michael Keaton, Lucy said, “Do you think that this Batman is better than—” before Danny interrupted to say Keaton was his favorite. Then she handed him a photo of Colin Farrell.

“Oh, Colin? I love Colin. He’s a terrific guy. My Penguin was better,” Danny said.

“Was that the truth?” he asked, looking up at the test’s administrator. “It certainly was. In my opinion. It’s my opinion. Good man though, Colin’s a good guy,” he said.