It seems I always learn the hard way on matters such as this one. Thought I needed one knife that could do it all; you know a digger, chopper, slicer and pounder. No such knife. Thought I needed a 7 inch blade...don't, 5 inches is enough. But one thing I was right on was the over engineering to handle the unexpected emergency like the woman here in the Pacific NW who, recently, fell off a trail and was stuck on a ledge. If she had a decent knife she could have used it to pull herself out but then she did not have a knife. Thin blade might break when 180 pounds are hanging onto it.
Dr. Rob you are right. K-Bars good. Camillus produced AF contract survival knives good also. My Leatherman Wave is also good. Heavy duty Becker BK-2 also good. Rambo knife bad.