The prevalent conception of science and knowledge in Iran and Islamic countries is distinguished from the modern conception of science in the industrial world. Based on this, it is explained why Islamic countries still have not accepted the modern conception of science, along with common examples. This differentiation of conceptions of science helps us explain the conception of religious science or sciences clearly. With the differentiation of designated religious science and exclusive religious science it can be explained why designated religious science is desirable and exclusive religious science is undesirable.
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