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The difference between a technician and a physician? 6-12 years of top-level education and experience. Don't confuse the two.
Yes, prions do not reproduce through the conventional genetic mechanisms. From my understanding, they encourage, through some direct protein-protein interaction, other polypeptides to fold incorrectly.
Think of it this way. HIV and other genetic disorders propagate through normal reproductive means. Like, if a person with an extraordinary innate musical ability has a child, that child will probably possess a natural ability for music.
However, if a talented musician adopts a child and then teaches him how to read music and how to play instruments, he will probably grow up to be equally talented.
Prions are similar to the latter case. They are encouraging other proteins, who don't in themselves possess any malicious function, the fold in such a way to attack the host.
This isn't reproduction. The "parent" prions are not in anyway responsible for the actual formation of the "child" prions. They are just responsible for causing them to become malicious, making them more role-model proteins than actual parents.
Not once in my 15+ years of using web browsers have I thought to myself "Man, this *browser* sure is slow." I've definitely said things like "Geez, this server sure is slow," and I've said "Golly, this flash movie is boggin' down my computer." Is the speed of the browser really making that big of a difference in actual use? I'm seeing some benchmarks in the post previews for this article, and they don't look like applicable numbers.
Simply put, answer me this question. On identical computers, on identical connections, exactly how much quicker or slower than Firefox would Opera be in returning a Google image search for "Cosplay Cammy Big Butt"?