I do not carry a knife. Just ask me for one. You'll immediately find it to be true. However there are instances of Divine Providence when I am mysteriously gifted with a knife in my hour of need by God. Afterward, I give thanks and it miraculously disappears again.
When someone asks, "Do you have a knife?" It is the most horrifying sound that can come out of a man's mouth. All at once it tells you so very much. He is unprepared. He is decidedly untrustworthy with and unworthy of your knife. He is probably not asking for the right tool for the job. He is definitely not going to return the edge in good condition. He will probably drop it and if at all possible in a place where it is unrecoverable or he is disinclined to engage in its recovery. For these reasons, I cannot carry a knife, lest I should be committed to aiding and abetting the helplessness which is a man without a knife.
I do not have a particular preference in the knife I don't carry, but if I did it might have two edges and be politically incorrect.