CIA used mock executions etc.

[Letum]

I work with logic because it produces logical answers. I can't see why you object to that.

"Man crosses street using legs. Therefore legs are effective at crossing street."

Could be tidied up to be valid, but

"If using legs to cross the street works then people wouldn't use legs to cross the street
People use legs to cross the street
Therefore using legs to cross the street works"

i.e. "if it didn't work it wouldn't be used. It is; therefor it does."
is not valid.