[SketchySeaBeast]

> There are exceedingly few things we can claim to apply everywhere, and even fewer we can "prove" to each other.

Yes, this is why hard and fast rules don't make sense, and why they should have "generally", "normally", or "mostly" attached to them.

If you have two categories of birds, one with those that fly and one that doesn't, having that second list doesn't make the first stronger. At some point that second list dilutes that first one so much that it doesn't make sense anymore.

If my rule is that "white guys are named Dave" does my building a list of every example of a Dave and non-Dave make my rule stronger? When does the "strong" nature of the rule get watered down sufficiently? Honestly, a list of hundreds of birds tells me that it's a weak rule and that the "birds fly" rule is wrong.