This is an old conversation so no one might see my comment. I could not help but notice the slight debate on tang nomenclature or jargon. Could this be historical somewhat as with other fields of interest like firearms? I saw many a gun store clerk actually get ornery when person referred to a revolver as a 'pistol', a term they reserved for an automatic or semiauto pistol. Actually, historically, revolvers were called pistols before any autos had been invented; and gunmen were often called by the Spanish term 'pistolleros'.
I always thought that originally full tang meant all the way back to the hilt or butt and rat tail was the same but tapered as if the knife was made from a rat tail file. Perhaps rat tail knives originated from knives made from large files. Thus, with my logic, Ka-bars would be full tang. I further thought that the distinction between full and full profile was added later.
As to strength in tang design, the seemingly weakest tangs, rat tails, are employed in the great classic knives utilised by the world's toughest knife fighters, Nepalese Gurkas in their heavy-bladed khukris. The good major mentioned below has worked with them and said he would not want to fight one who was really mad. Gurka fighting kukris are rattail tanged. Their similar farm kukris are often full profile, as trees are tougher than flesh. So basically, the most proven heavy fighting knife known has a thin rattail tang.
Though soldiers, marines, and sailors have had to use Ka-bars as survival knives and done so successfully, as a Green Beret, medical corpsman major has related to me, they are primarily for killing, not chopping wood, as the good major also agreed on. This Big Brother, which is essentially a modern 'Bowie' and definitely a fighting knife, would seem to be abused if used for batoning and the like unless one had no other choice. I hate to see high quality knives misused because of the survivalist urge, but I suppose such testing is necessary to be prepared if the need arises. I carry a small quality hatchet, and for lighter weight have a quality tomahawk made by Boy Scouts decades ago. If you must have a knife that is a multitool in a knife sort of way, try a Condor heavy khukri (kukri). It has a ten inch blade you could probably dig a fox hole with.