"Say “I don’t know” or “I don’t have an opinion” when you don’t"

My father drove this into us as kids. It always made sense to be, and then I grew up, and realized how many times adults just make shit up to avoid looking like they don't have the answer. My in-laws are pros at this, and playing Balderdash against them is impossible as a result.

To this day, as some one that has been an engineer for 36 years, if someone asks me a question and I don't know the answer, I say "I don't know", generally followed by, "let's see where we would find that answer".

And I am raising my kids with the same advice.