Traditionally, only “individual-independent” facts are inputted to a reasoner. The reasoner will produce the same answer to the same question, regardless of who the questioner is. However, since ontology reasoners have their facts distributed in the open internet environment, reasoners may contain “individualdependent” facts. Personalized reasoner is becoming possible. Furthermore, gathering “individual-dependent” facts from different individuals often contains inconsistent information or contradictions (Staab 2004). Manually solving the contradictions as usual is not a practical way out. Capability for personalized reasoner to reason with inconsistency should be developed. A personalized reasoner based on belief strengths of information sources is proposed in the paper. Key steps toward such a personalized reasoner are outlined below.