From Jiri Baum.

Sir, In his reply to Richard Epstein’s “Why open source is unsustainable” (FT.com, October 21) James Boyle writes that an analysis of Professor Epstein’s legal concerns would require an extended article; in fact, it is much simpler than that. Prof Epstein’s concerns seem to be summarised in a single sentence about two-thirds into the piece: “Once the contract protection lapses, then the open source movement is left only to its copyright remedies, which are likely to prove far weaker.”