how does /sci/ deal with thanksgiving dinner questions ?

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>mention im a math major
>"oh so you want to be a teacher?"
>well thats one option but i plan on going farther than that
>"so tell us what are you learning right now ?"
>taking real analysis so i say "we are constructing and carefully proving various properties of the real numbers system"
>real numbers ? i remember learning that in pre algebra
>sister being a sociology major starts laughing saying "wow i thought u were supposed to be smart"
>try to save face by impressing them somehow "i can prove that there are bigger infinities than others"
>everyone gives me a concerned blank stare sister asks if i took my medication today
>i double down by asking "how many real numbers are between 0 and 1
>"anon there are none 1 comes after 0 "
>wrong, consider how many points the sequence 1/2^n ....."
>mom asks how am i going to use this in the real world
>"actually I can use this to prove for a fact that 0.99999.... 1 "
>they change topic and now my sister is the golden child and im dreading coming to thanksgiving this year especially bc im taking abstract algebra it would go like " anon wtf are these homomorphisms u talking about "


how do you guys deal with these types of questions ?