There is a joke I love that illustrates the concept: "Ladies and gentlemen of the jury, my client was nowhere near the scene of the murder, he didn't mean to pull the trigger, and that son-of-a-bitch had it coming!"
These three can in fact be all true at once, so the arguments are consistent, unlike kettle logic. "Didn't mean to pull the trigger" does not imply the defendant could pull the trigger.
1. The accused was nowhere near the scene of the murder
2. The accused was at the scene of the murder, and in fact committed the murder, but on accident
3. The accused committed the murder on purpose, because the victim had it coming.