The age gap and Dad's knowledge

At  4: Dad knows everything.
At  7: Dad knows a lot.
At  8: Dad does not know everything.
At 12: Well, Dad won't know anyway.
At 14: Dad is hopelessly old-fashioned.
At 21: Oh heck, the man's time has long passed, how would he know!
At 25: Dad knows something, but not very much.
At 30: I'll just hear what Dad has to say anyway.
At 35: Let's wait a while and hear what Dad's opinion is.
At 50: I wonder what dad would have said.
At 60: Dad, in actual fact, knew everything.
At 65: I wish I could have discussed it with Dad.