I researched all the fishing knots I could find on the web (quite a few) for the purpose of using them with some survival dental floss for general tying and lashing. The fishing knots all seem to be for joining two lines together or for attaching a line to a hook, lure or leader (tied on a slack line and then carefully tightened). There was really nothing for securing a line under tension or tensioning a slack line (the functions of 2-half-hitches, a taught-line-hitch, square knot, etc.). I have decided that general lashing and tying around a survival camp won't be convenient without those kinds of knots, so dental floss is out. <br><br>The good news is that I found some very thin nylon string that I think I originally purchased as kite string that is only slightly thicker than dental floss and that knots beautifully. Forget dental floss, I'm going with the string.<br><br>By the way, if you are looking for a good knot for attaching monofilament to a fish hook, search the web for "Trilene knot." Apparently this knot is the latest and greatest. I include a Trilene knot diagram with my emergency fishing equipment. As a casual and uneducated occasional fisherman, I know that having the knot slip loose and come off of your hook is a very big possibliity since monofilament is so smooth and poor at holding knots. This would not be welcome in a survival situation. Losing the fish is bad enough, but losing the hook could be worse.<br><br>