The debate on the possibility of attaining metaphysical knowledge by the method of reasoning began with the ancient Greek philosophers and continues to this day. This article aims to examine how Râzî argues for the possibility of attaining metaphysical knowledge through the method of reasoning. He first argues that existence has two parts, the sensed and the thought, in order to demonstrate that metaphysical knowledge can be obtained through the method of reasoning. Then he tries to prove that existence is (...) not limited to the material. After presenting evidence for the existence of things other than the sensible in existence that can be perceived with the intellect, he tries to discuss our devices to relate to this sphere of existence in a comparative manner. In this comparison, two possible devices for attaining metaphysical knowledge emerge: the theoretical intellect and the purified soul. After revealing the positive and negative aspects of both in this comparison, he argues that the most reliable device is the theoretical intellect and the technique is the method of reasoning Râzî gives various answers to those who object to the possibility of obtaining metaphysical knowledge through the method of reasoning. Râzî tries to put forward the grounds on which the groups who object to the method of reasoning are based. He then evaluates their justifications in terms of accuracy and consistency. Thus, he tests both the relevance of each group's objection to the subject and its consistency with the group's other beliefs. He then presents the justifications for his own opinion on the method of reasoning and the consistency of this method with his other beliefs. Following this method, Râzî first divides those who object to the method of reasoning into two categories according to whether or not they accept a metaphysical sphere of existence. According to this division, those who object to the method because they do not accept a metaphysical sphere of existence are the Sophists, Sumeniyya, Mujasimah, Dhahriyya, and Hashawiyya. Although this group does not accept a metaphysical sphere of existence, they are divided into two classes: those who believe in God and those who do not. According to Râzî, the group that accepts the metaphysical sphere of existence but objects to the method of reasoning is the Talimiyya. They claim that metaphysical knowledge can only be attained through the teaching of an innocent instructor, not by the method of reasoning. The different approaches of these groups are the reason why Râzî sometimes emphasizes accuracy, sometimes consistency, and sometimes proving the metaphysical domain of existence in his answers to those who object to the method of reasoning. (shrink)

Watermarking is one of the most common techniques used to protect data’s authenticity, integrity, and security. The obfuscation in the frequency domain used in the watermarking method makes the watermarking stronger than the obfuscation in the spatial domain. It occupies an important place in watermarking works in imperceptibility, capacity, and robustness. Finding the optimal location to hide the watermarking is one of the most challenging tasks in these methods and affects the method’s performance. In this article, sample identification information is (...) processed with the method of watermaking on the hiding environment created by using a chaos-based random number generator on biomedical data to provide solutions to problems such as visual attack, identity theft, and information confusion. In order to obtain biomedical data, a lensless digital in-line holographic microscopy setup was designed, and holographic data of human blood and cancer cell lines, which are widely used in the laboratory environment, were obtained. The standard USAF 1951 target was used to evaluate the resolution of our imaging setup. Various QR codes were generated for medical sample identification, and the captured medical data were processed by watermarking it with chaos-based random number generators. A new method using chaos-based discrete wavelet transform and singular value decomposition has been developed and applied to high-resolution data to eliminate the problem of encrypted data being directly targeted by third-party attacks. The performance of the proposed new watermarking method has been demonstrated by various robustness and invisibility tests. Experimental results showed that the proposed scheme reached an average PSNR value of 564588 dB and SSIM value of 0.9972 against several geometric and destructive attacks, which means that the proposed method does not affect the image quality and also ensures the security of the watermarking information. The results of the proposed method have shown that it can be used efficiently in various fields. (shrink)

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