I would say that their is no biological imperative to pass the knowledge / tricks to their offspring. This holds true with most, if no all, species. I remember reading about a gorilla who could sign over 200 words -- but when she had offspring, she did not teach her child (?) anything. Crows are very intelligent but the same situation -- each generation has to find its own way.
Instant thought- I learned asl in middle school. Theoretically, if for eg. My mother lost her ability to hear..... would I be able to speak with her using the language she's going to need to learn?
Hypothetically, she'd futeretense have learned what I'm saying now some day......?????
Pondering the force s of universal rules against the maternal inability to pass on her gnowledge?