How Openness Prevents Plagiarism

Here's an important conclusion drawn from the rather sad Joyce Hatto saga:

It's a perfect example of what we've been saying about artists putting their work online: sharing files widely prevents plagiarism, by making it much easier to detect. One couldn't ask for a better drama to illustrate the point. Never mind Joyce Hatto — think instead of all those other pianists, whose recordings were passed off as her work: the only reason the hoax was detected was because their recordings were being shared online too!