How to say “It’s not rocket science” before rockets existed

Prior to the invention of rockets, was there a phrase equivalent to: “it’s not rocket science”? If so, what was it? Here I am looking for a phrase that makes a comparison with a difficult job/task, so “easy as pie” wouldn’t work. I’m also looking for a phrase that would also have been used before … Read more

When should “no problem” replace “you’re welcome” as a response to “thank you”?

I have observed a growing trend in which people substitute “no problem” for “you’re welcome” as a response to “thank you”. In particular, it seems to be an increasingly common response from servers and store clerks. It seems to me that “no problem” isn’t appropriate for all situations as a response to “thank you”, such … Read more