Joel,
"The fact that a half inch or so stays inside the handle could be seen as irrelevant. Its all still the blade, right?"
You are right in that this method of measure is the absolute worst, may I add most idiotic.
The blade ends where the handle begins, as in the *very first* point of contact from the tip of blade. There is NO overlap.
Now the edge of the blade/handle juncture can vary by way of wavy or sloped contours, but there is no overlap. If people measured 'blade' length by the blade's 'tang', they would have to measure down almost the entire length of most fixed blade handles because the steel from the blade usually extends way down the handle. Even the ridiculous 'four finger' measurement is done from the top of handle to the fully opened blade tip.
For anyone encountering someone with this 'blade tang is inlcuded in the blade length' philosophy, please rationally and convincingly educate them in proper measurement assesment, for all our sakes.
Uranium,
"The law specifically says 4" and up is illegal"
If this is exactly the way it is stated, then I understand you wanting to keep a buffer zone from the 4" mark.
But understand, 'you' have got to draw the line somewhere. If you want to prepare for the *worst* case method of measuremnt, you'll end up carrying a 2" blade folder or something. You have apparently checked into your states codes and know your rights. In my opinion, if you have the written law in your favor(and aren't engaged in other illegal activities at the moment), then let the authorities do their 4 finger measurement. If they choose to be more 'abstract' in thier interpretations of the law, you should become more 'exact' in yours and carry a section of a ruler that goes up to 4" whenever you tote your knife and it wouldn't hurt to be able to cite a few specific sections of code to let them know they can take your knife from you for various BS reasons, but both you and they know the law will favor you in the end so that you are the good citizen and they are the seedy cop.
Ken
ps- Go with the Genesis.