I have had some fun in the last couple of weeks debating the Microsoft Rules Engine with Peter Lin. Many people in the BizTalk community will know that Peter used Amazon and The ServerSide site early this year to launch an attack on Microsoft's representation of their rules engine. A few weeks ago the issue arose again on the TSS site. There has followed a debate in which I have chiefly aimed at showing that Peter has no grounds whatsoever for the claims he makes.