In a spirit of fairness, I could make a slightly plausible but somewhat inaccurate assertion in a confident tone, you can knock it down comprehensively, I'll claim that I only included it as a hypothetical, and we'll be even.
One word: context. It's one that often gets missed in forum discussions as people tend to take things a quote at a time and deconstruct arguments. Herc asked how, and I said it was technically possible. If you know otherwise then feel free to show the world your brand new quantum cryptography method.
Apart from that this is in danger of being both off-topic and getting personal.