I don't know, rigor is really hard to define outside of sciences, and even then, a science can be not as rigorous as others and still tell you useful things. I

I don't know, rigor is really hard to define outside of sciences, and even then, a science can be not as rigorous as others and still tell you useful things. I mean, economics isn't quite as rigorous as physics, but it's still useful. One of the hardest but most rewarding classes I took in college was creative writing. There's not a ton of "rigor" to that; a lot of it is really subjective, and even with the widely agreed upon rules, there are certainly times when it's useful to break them. But I learned a ton from that class all the same.