An expert system is provided for answering questions provided by a potential purchaser of goods or services using a neutral sales consultant in which a question sentence entered by the purchaser is understood using specialized library tables developed to understand both the subject and form of the question sentence. Thereafter an appropriate or relevant answer to the question is automatically given relating to sale of the product or service. The result is that questions are more easily understood by the system and more relevant answers can be given because both relate to specialized fingerprint parameters and the use of neutral experts.