Abstract
Although many studies have tried to reduce differences between conceptual models of thinking processes, through the description of the operational performance of any intellectual task includes problem solving, however, because of the design specificity in this regard, and diversity of its motion, there were always, many of obstacles that stand in the way of developing a model describes the operations of reasoning achievement during different architectural design phases. The need for explicit language of designer thinking, and architects performance or how they underlined such aspects, was incentive concern for many contemporary studies, which tried to cover this area in one way or another. This research tries to investigated designer logical behavior during a design process, through the review of inference acts, during conceptual stage of that process, also it tries to investigate the nature of the mobility of this behavior across time of the task.
Keywords: Logic, Logical Structure, Architectural Inference, Architectural Design
