It is 100% certain that an executed criminal will not commit another crime. So yes, execution deters crime.
Non-sequitor. It is _not_ 100% certain that an executed criminal would have committed more crimes.
The system doesn't work. As this fellow has been telling you. Also, he tried to use the system. It chewed him up and spit him out, as it tends to do when it is challenged in any way.
He was using the wrong system. He's moved on to another wrong system.
Hell, you throw 'em in jail.
Was with you until here.
The primary educational system has pretty dismal outcomes.
Did you mean k-12 education? Primary usually means k-6 and is actually one of our strong suits. It's the 7-12 where we royally suck. This is known as secondary education.
What is research but a blind date with knowledge? -- Will Harvey