(September 23, 2015 at 1:59 pm)Minimalist Wrote:Quote: Saying "it is obvious" is never a proper justification for something.
I recall in geometry class in high school the teacher was talking about proving congruent angles or something and one guy goes to the blackboard and says "it's obvious."
It was a running joke for the rest of the year.
I think that must happen in a lot of geometry classes.
I have an off-topic question for you. Why is it that you rarely say who it is your are quoting? (In this specific example, it is me, which makes this an opportune time for me to ask you about this.)
"A wise man ... proportions his belief to the evidence."
— David Hume, An Enquiry Concerning Human Understanding, Section X, Part I.