https://www.nicovideo.jp/watch/sm33275372 https://www.youtube.com/watch?v=dJ7L5G7-L2A&feature=youtu.be

2. “The best way to find out if you can trust somebody
is to trust them.”
— Ernest Hemingway —

5. A B
A

10. A B
, Yes

11. , -

12. ,

13. A B
((2/5, 3/5), (3/5, 2/5))
,

14. ”A ”
, -
A B

16. B C

17. B C

18. ( a2, b2-(2/3,1/3), c1-(2/5,3/5) )

19. “ ”

20. “ ”

25. See you next time

27. orz
B C B C

28. A B
, B