Carl Sagan said "Extraordinary claims require extraordinary evidence"
I'm going to ignore the "Carl Sagan said" bit. Let's not bother with the obvious appeal to authority there and pretend it didn't happen.
The bit I really want to look at is the catchphrasy sound bite.
This appears on the list of Atheist Clichés That Need To Stop Being Said. Anything on that list is something we hear a lot, and tells us that the person saying it hasn't really thought it through.
Not saying Carl Sagan is a moron. Just that when he came up with this particular often-shared phrase, he was having a lax day. Probably watching some daytime TV and was a bit hungry but couldn't be bothered to get up.
Now, if you can figure out for yourself why the phrase "Extraordinary claims require extraordinary evidence" is nonsense, good on you! You have no need to read on.
If you can't see the problem, go ahead with the next bit. We won't tell anyone and you can kick yourself later.
