Well, it doesn't establish that induction is always valid, so I guess we might not really be disagreeing. But, pragmatically, everyone basically has to assume that it usually works, or is likely to work in whatever the particular case is. I think it's a good enough heuristic to be called a rational principle that people already have down.
OK, forget it.
I was just wondering. Human minds are messed up in 1001 ways, but are there a few rational principles that most people already have down? Of course, the answers to this question are probably so extremely obvious that I haven't even considered them. But I ask all the same.