CW: "This works, right?"
Me: "It should, but I haven't tested it."
CW: "I mean it's new, so it works, right?"
Me: "Yes, it is new, no that doesn't mean it works correctly. That's why I test them."
CW: "But it's brand new!"
Me: "Yes. Still doesn't mean it's guaranteed to work. Both can be true."
10 days ago