Says it all.

[Speck Tater]

5. You can also kill someone with 1/2 a dixie cup of water.

If you can get it into their lungs.

The point how efficient is method of delivery of the lethal effect? If someone bursts into your house with a gun are you really going to defend yourself with a knife? The odds are you will end up dead. In that situation the knife is no more effective than that 1/2 cup of water.

I don't own a gun and I never want to own a gun. But I'm not stupid enough to believe that a knife has the same effectiveness as a gun. Even a one-shot-at-a-time gun. So I would never arm myself with a knife and tell myself I was safe against a gun. I favor pure defense. Hardened doors and windows, and safe place to run and hide.

The so-called equivalency is false, so the argument is flawed.