“Saying I don’t know… turns a question into a homework assignment.
As long as I follow up with the answer later, they never mind.”
“Rather than nodding your head when you don’t know what someone is talking about, or blindly guessing an answer (only to be proven wrong), give yourself permission to not know it all.
Simply admit that you don’t know the answer, while adding that you’re happy to find out and tell them the answer later.
Not only will you save yourself from potential embarrassment, you’ll be perceived as more reliable and trustworthy.”