Can an ordinary kitchen knife be an Athame?

I'm researching Wicca and I'm trying to formulate my altar for the day when could I devote myself (to the best of my abilities) to the craft. A knife is a knife (or at least that's what some people tell me). I know that if the Athame were to taste blood it must be discarded of disposed of, but still:... show more I'm researching Wicca and I'm trying to formulate my altar for the day when could I devote myself (to the best of my abilities) to the craft. A knife is a knife (or at least that's what some people tell me). I know that if the Athame were to taste blood it must be discarded of disposed of, but still: Can an ordinary, non-specially-made-for-ceremony knife be just as good?
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