The ideas and concepts you're referring to are called patents. SCO has none of those (at least not relevant ones), IBM has many. So, how exactly is SCO going to use that against IBM? Software licence by AT&T is NOT about patents in any shape or form. . Open source community is doing SCO a big favour. They are trying to identify the (alleged) infringing code so that SCO finally have ammunition to go after the copyright infringers. But no, SCO are not doing any of that. Thousands of CDs with Linux are pressed every day, the software is downloaded freely and copyright holder (SCO) is standing by doing nothing. How will they explain this one to the judge? . They won't. They don't want to see the inside of the courtroom by any stretch of imagination, simply because they have no case. None. . Their evidence has been shown to be publicly available code, either without copyright or under a BSD licence, some even developed independently by Linux developers. The code is not secret by any standard (heck, even I have a copy), so their trade secret claims go out the window. JFS and RCU are independent and patented works of IBM (unless SCO now claims they own OS/2 and IBM patents as well). Similar applies to NUMA and other stuff they mentioned in their lawsuit. . Out of all this, you conclude that SCO has some 55% - 60% chance of winning. I think you must have used the same team of non-existent rocket scientists from MIT, that SCO used to find the infringing code, to calculate this number. No?