Part 2:
After the trolley passes by, you can safely check if there was anyone in the tunnel if you want.
If there was/is anyone, there will be a clear sign like a light (ie you don't have to worry about seeing them if you don't want).
What do you do?
Trolley problem:
A runaway trolley headed into a tunnel has a 50/50 chance of hitting 5 people. You can pull a lever and redirect it so that it hits any 2 people of your choosing (that you've personally met)
No one will know your choice
Do you...