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John : The pictures above tell you the difference between private tutorial and public lecture. 

Me: In a public lecture's hall, there're plenty students,  say, 1,000. 

John : Good.  However,  in a tiny private tutorial's room of 2 square meters,  there're very few students,  say, only 10 students. 

Me: Ok.

John : Take a look.  https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami . Miuson hacked the system of "Alerts" of earth quake. Is it a Campus killings ?

Me: It's not a Campus killings.  Because,  earth quake isn't predictable. 

John : Good.  The process is that Kelvin is Miuson's students.  Amori is Kelvin's students.  Amori is a Japanese.

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Miuson: Tell Amori the system of the alerts of earth quake got hacked. 

Kelvin: Don't you mind?

Miuson : Why should I mind ?

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John : Say, there're 1,000 Japanese students.  Miuson only notify Amori.  

Me: Only ?

John: Yes,  is it a Campus killings ?

Me: Yes, it is.

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Bradley : Kill those students,  e.g., Kelvin and Amori. 

Miuson: I only notify them that the system got hacked.  I didn't teach them how to hack the system. 

Bradley : There're over 1,000 Japanese students.  You notify them all. Don't notify Amori only. If you only notify Amori, it's a private tutorial not a public lecture.  So, kill them.

Miuson : Any alternative?

Bradley: Alternative? Yes, you ask them to kill people 

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John : Guess what happen ? Take a look. 

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1) April 12 2012 – A car in Kyoto crashed into a pole and hit multiple pedestrians, resulting in 8 dead (including the driver) . 

2) May 13 2012 – A hotel fire in Hiroshima, killed 7 people. 

3) August 15 2013 – An explosion at the 2013 Fukuchiyama Firework Festival event kills 3 people.

4) October 11 2012 – A fire broke out at Abe Orthopedic Hospital in Fukuoka City, resuled in 10 deaths.

5) January 9 2013 – Mitsubishi Materials Yokkaichi plant explosion, kills 5 persons in Mie Prefecture.

6) May 17 2014 – A fire broke out in a dormitory apartment in Kanagawa Prefecture, resulted in 11 deaths.  

June 30 2014 - A passenger set himself on fire while traveling on the Tokaido Shinkansen to Odawara City, Kanagawa Prefecture, resulting in 2 deaths. 

July 26 2014  — A Piper PA-46 aircraft crashed in a residential area in Tokyo, causing a fire that killed 3 people. 

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John : Miuson killed 49 people "on behalf of" Kelvin and Amori.

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