Legal Question in Criminal Law in Texas

Re: what is the legal definition of a blade

I've often wondered about this too. The fact is, the law isn't real clear, which means in reality, you could end up taking a ride to jail, but beat the charge in court. I mean, the question boils down to, what is a "blade"? Is a piece of metal, or even wood or plastic a "blade" if it can't cut anything? If only a part of the "blade" is able to cut, is the whole thing a "blade?" Statutes that are too vague are unconstitutional, so there's one method of defense. I notice the statute in Tex. Pen. Code 46.01(6) defines "knife" as any bladed hand instrument that is capable of inflicting serious bodily injury or death by cutting or stabbing a person with it. So, even if it was dull as a bowling ball, it seems like if it could be used to stab someone to any depth, then it's a knife, but then the question remains, is it an "illegal" knife? A knife's not illegal if its blade is not longer than 5&1/2 inches long. Like so much of the law, it's just all grey.