In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

What kind of a audio device is talked about in this scenario?, Context: In lossy audio compression, methods of psychoacoustics are used to remove non-audible (or less audible) components of the audio signal. Compression of human speech is often performed with even more specialized techniques; speech coding, or voice coding, is sometimes distinguished as a separate discipline from audio compression. Different audio and speech compression standards are listed under audio coding formats. Voice compression is used in internet telephony, for example, audio compression is used for CD ripping and is decoded by the audio players.
internet telephony, for example, audio compression is used for CD ripping and is decoded by the audio players

What is needed to prove the theory?, Context: In the early 11th century, the Muslim physicist Ibn al-Haytham (Alhacen or Alhazen) discussed space perception and its epistemological implications in his Book of Optics (1021), he also rejected Aristotle's definition of topos (Physics IV) by way of geometric demonstrations and defined place as a mathematical spatial extension. His experimental proof of the intromission model of vision led to changes in the understanding of the visual perception of space, contrary to the previous emission theory of vision supported by Euclid and Ptolemy. In "tying the visual perception of space to prior bodily experience, Alhacen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things."
vision

Why is independent thinking bad, Context: Doctrines of Jehovah's Witnesses are established by the Governing Body. The religion does not tolerate dissent over doctrines and practices; members who openly disagree with the religion's teachings are expelled and shunned. Witness publications strongly discourage followers from questioning doctrine and counsel received from the Governing Body, reasoning that it is to be trusted as part of "God's organization". It also warns members to "avoid independent thinking", claiming such thinking "was introduced by Satan the Devil" and would "cause division". Those who openly disagree with official teachings are condemned as "apostates" who are "mentally diseased".

cause division