Joshua Landy just posted a very interesting blog entry here, partly on how the fallacy of conversion tends to work in Derridean argument.  I am no longer enchanted by Derrida -- I've been... deconverted? deprogrammed? -- but I was prompted to defend him in the comments to that post. 

This post is a response to a comment made by Andrew Goldstone in a comments thread on Joshua Landy's fascinating Arcade blog post, "Human Minds, Literary Texts, and CD Players."