The crime lab reported that they had identified three possible murder weapons. A College Diploma in Deductive Reasoning: With its heavy oak frame, you could really do some damage. And they say a logic degree is useless.... Leather Gloves: Beware of someone who wears leather gloves. You know they have already killed a cow. A magnifying glass: This could be used to find a clue, read fine print, or even start a fire.