1: According to the video, what is "social reality testing" and why do we need other people for it?
2: Which specific parts of the brain shrink or grow as a result of long-term isolation?
3: In a world where we can connect with anyone online instantly, do you think people today feel more or less lonely than previous generations?
4: What do you think is the most difficult part of being completely alone for a long period the silence, the boredom, or the lack of someone to talk to?
5: If you were stranded on a deserted island and could only have one person with you, who would it be and what quality in them would help you stay sane?