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The MPEG-1 standard does not include a precise specification for an MP3 encoder, but does provide example psychoacoustic models, rate loop, and the like in the non-normative part of the original standard. At present, these suggested implementations are quite dated. Implementers of the standard were supposed to devise their own algorithms suitable for removing parts of the information from the audio input. As a result, there are many different MP3 encoders available, each producing files of differing quality. Comparisons are widely available, so it is easy for a prospective user of an encoder to research the best choice. An encoder that is proficient at encoding at higher bit rates (such as LAME) is not necessarily as good at lower bit rates.

What were implementers of the standard supposed to devise?
Answer: their own algorithms
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There are several academic libraries and archives in Paris. The Sorbonne Library in the 5th arrondissement is the largest university library in Paris. In addition to the Sorbonne location, there are branches in Malesherbes, Clignancourt-Championnet, Michelet-Institut d'Art et d'Archeologie, Serpente-Maison de la Recherche, and Institut des Etudes Iberiques. Other academic libraries include Interuniversity Pharmaceutical Library, Leonardo da Vinci University Library, Paris School of Mines Library, and the Rene Descartes University Library.

In what arrondissement is the Sorbonne library in Paris located?
Answer: 5th
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While he was imprisoned in the castle of Fardajan near Hamadhan, Avicenna wrote his famous "Floating Man" literally falling man thought experiment to demonstrate human self-awareness and the substantiality and immateriality of the soul. Avicenna believed his "Floating Man" thought experiment demonstrated that the soul is a substance, and claimed humans cannot doubt their own consciousness, even in a situation that prevents all sensory data input. The thought experiment told its readers to imagine themselves created all at once while suspended in the air, isolated from all sensations, which includes no sensory contact with even their own bodies. He argued that, in this scenario, one would still have self-consciousness. Because it is conceivable that a person, suspended in air while cut off from sense experience, would still be capable of determining his own existence, the thought experiment points to the conclusions that the soul is a perfection, independent of the body, and an immaterial substance. The conceivability of this "Floating Man" indicates that the soul is perceived intellectually, which entails the soul's separateness from the body. Avicenna referred to the living human intelligence, particularly the active intellect, which he believed to be the hypostasis by which God communicates truth to the human mind and imparts order and intelligibility to nature. Following is an English translation of the argument:

How did Avicenna want man to think of themselves as?
Answer:
suspended in the air, isolated from all sensations