When faced with purchasing patents on their own or as part of an acquisition, or dealing with an issue of infringement, the cost and time of evaluating how significant a problem or opportunity is, in front of you is very high and in most cases the resulting evaluation is vague and simply suggests that more money and time is needed. Thus you must trust your gut or the gut of a hourly rate, IP lawyer to determine if it is worth spending more money to deal with this problem or opportunity. Using your gut or trusting others is risky, and inconsistent.