I have some skeptical family members who like to talk about 3rd party anecdotes. "A nurse told me she saw blah blah blah happen". As you say, stories like this are not a way to know a thing, but I can't get them to understand.

It's like we rolled a die once, and it came up 6, and now we're all forming our own special opinions on whether or not the die is fair. We just can't know. Of course, if someone rolled the dice 30,000 times and reported what they found, that would be great (wink wink).

Instead of using Calc 1 as a filter course, we should use Statistics instead.