One problem attracted the minds of many philosophers in Islamic philosophy is that of place and, following it, vacuum. The question: do vacuum and fullness exist? and given their existence, are they something other than place or are they included in it? In the paper, has been intended to answer: what may be known as the particularities of them? How may one prove their existence? There have always been two perceptions of the place: one taking place as the outer surface of a body, and the other as being of three dimensions of length, depth, and width in which the body is situated. this question, however, arises: Is a body of three dimensions? If so, does the place which is of three dimensions include all dimensions of the body thoroughly? In other words, is a body thoroughly situated in its place or each of its dimension is situated in one dimension of the place? Most Muslim philosophers have negated vacuum; some of them, however, have sought to prove it. As concluded in this fundamental research with an analytical and descriptive method, Avicenna has viewed the place as being the outer surface of the contained or the inner surface of the containing body and in any case, place may not be other than the placed, mutumakkin, that is, the contained or the containing. He, therefore, cannot accept the vacuum as an environment free of any material. Ibn Sina has based the falsity of vacuum of on three principles: 1. the vacuum`s lacking of dimension; 2. The assumption of its infiniteness; 3. Proving the falsity of movement in an infinite environment.
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