As I said to Jobo, the point is eliminating the least likely candidates. If a school makes no claims (nor puts any discussion about) training to fight and/or defend, it's a pretty low likelihood that school will deliver combat-ready skills. There will be exceptions, but they will be exceedingly rare. Schools that claim to deliver those skills are usually at least trying to, and that attempt makes it more likely they'll succeed. Some will be crap, for sure, but your chances are better in that subset of schools. If you only have a few to choose from, review them all. If you have 50 to choose from, focus on those that claim to deliver what you're looking for.