Name a tort for which there does not have to be an intent to harm.

If a runner for a law office causes a wreck and injures others while delivering documents to the courthouse, who may be liable and why?

If a passerby is injured in an attempt to help a child who is being attacked by a neighbor's dog, who is liable, and why?

If while in a store, a patron ignores a "wet floor "caution sign, slips and falls, injuring himself, who may be liable and why?

If the same person is blind, does it make any difference?

If a person is injured at a swimming pool when hit by another swimmer doing a "cannonball" into the pool, and there are signs warning that no lifeguard is on duty, who may be liable and why?$|$

Can gossiping be a tort? How and why?

Can talking to a friend into breaking the lease on an office building be a tort? How and why?