Vincent: Want to talk about MOND?
Jules: No man, I don’t consider MOND.
Vincent: Are you biased?
Jules: Nah, I ain’t biased, I just don’t dig MOND, that’s all.
Vincent: Why not?
Jules: MOND is an ugly theory. I don’t consider ugly theories.
Vincent: MOND makes predictions that come true. Fits galaxy data gooood.
Jules: Hey, MOND may fit every galaxy in the universe, but I’d never know ’cause I wouldn’t consider the ugly theory. MOND has no generally covariant extension. That’s an ugly theory. I ain’t considering nothin’ that ain’t got a proper cosmology.
Vincent: How about ΛCDM? ΛCDM has lots of small scale problems.
Jules: I don’t care about small scale problems.
Vincent: Yeah, but do you consider ΛCDM to be an ugly theory?
Jules: I wouldn’t go so far as to call ΛCDM ugly, but it’s definitely fine-tuned. But, ΛCDM’s got the CMB. The CMB goes a long way.
Vincent: Ah, so by that rationale, if a theory of modified dynamics fit the CMB, it would cease to be an ugly theory. Is that true?
Jules: Well, we’d have to be talkin’ about one charming eff’n theory of modified dynamics. I mean, it’d have to be ten times more charmin’ than MOND, you know what I’m sayin’?