Stephen Wolfram Q&A, For Kids (and others) [January 22, 2021]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: In addition to keystrokes, do you monitor your words spoken? - Does your system record all your passwords? - How do vaccines work? - If a disease is such that the thing which kills is the immune response itself could a vaccine based on these principles be actually dangerous? - Have you ever met Tim Berners-Lee, Douglas Engelbart, Edward Feigenbaum, and/or Shafi Goldwasser? - Stephen Wolfram, my 3 years old sister told me that she doesn't likes math, and doesn't want to play with science with me, what can I do to change her mind? - What are time crystals? Do they become ordinary space crystals when moving very fast? - Do we have explanation why people have sense of discreteness (symbols, objects and such). Is world implicitly discrete or we just perceive it that way? - Can't we upload all the data about the human body and fix everything. We have computing power and A.I to classify why don't we understand it? - Has anyone looked at the complexity of a cell? can we not say that it exhibits intelligence? can intelligence exist without brains?