Studying logical rules, being familiar with them, and observing them helps in controlling and tightening human thinking, and then the validity of the results reached by the researcher, thinker, and science worker. Moreover, the sciences in general -the legitimacy and humanitycannot be assimilated and understood without even being briefly aware of the rules of sound logical thinking; Which can be obtained from the rules of logic. Accordingly, the idea of this research is to shed light on how to

more »

... pply some logical rules in the research of ideas and the understanding and study of sciences. As every science is a perception and belief; This is the subject of the science of logic, "perceptions and affirmations insofar as they lead to a conceptual or verifiable unknown." The sciences in terms of their inclusion of principles that pave the way for them, and definitions that define them, ‫الدع‬ ‫كلية‬ ‫حولية‬ ‫ـ‬ ‫اإلسالمية‬ ‫وة‬ ‫بالقاهرة‬  ‫الفكر‬ ‫ضبط‬ ‫يف‬ ‫املنطقية‬ ‫اعد‬ ‫القو‬ ‫اعاة‬ ‫مر‬ ‫أثر‬ 335 ( ‫العدد‬ 5 3 ) 21 20 / 2022 -‫اجمللد‬ ‫األول‬ and clarify their contents a conception. And in terms of the provisions related to it, the rules governing it, and the topics whose issues are ratification. Since the topics of logic are many and varied, the study was limited to rooting and clarifying the intent of the concepts that are the first section of the rules of logic, which is the explanatory saying, definition, or identifier, and the effect of its observance in controlling thinking. Likewise, the research was limited to rooting and clarifying the intent of ratifications, which is the second section of the logical rules, which is analogy or argument, and the impact of their observance in controlling thinking. This study came as a statement and revealed three points: The first: the definition of logical rules, and their relationship to thinking. It includes an explanation of the importance of studying logic, its relationship to science, and the definition of thinking and its connection to logic. The second: the logical controls of definitions as the destination of the conceptions that are the first section of logic, and the impact of their observance in controlling thinking. The third: the controls of the logical argument, as ‫الدع‬ ‫كلية‬ ‫حولية‬ ‫ـ‬ ‫اإلسالمية‬ ‫وة‬ ‫بالقاهرة‬  ‫الفكر‬ ‫ضبط‬ ‫يف‬ ‫املنطقية‬ ‫اعد‬ ‫القو‬ ‫اعاة‬ ‫مر‬ ‫أثر‬ 336 ( ‫العدد‬ 5 3 ) 21 20 / 2022 -‫اجمللد‬ ‫األول‬ it is the purpose of the ratifications, which are the second part of logic, and the effect of observing them in controlling thinking.