CAS ID #: 67-64-1. Summary: Acetone is a manufactured chemical that is also found naturally in the environment. It is a colorless liquid with a distinct smell and taste.It evaporates easily, is flammable, and dissolves in water.It is also called dimethyl ketone, 2-propanone, and beta-ketopropane. Acetone is used to make plastic, fibers, drugs, and other chemicals. It is also used to dissolve other substances.t evaporates easily, is flammable, and dissolves in water. It is also called dimethyl ketone, 2-propanone, and beta-ketopropane. Acetone is used to make plastic, fibers, drugs, and other chemicals. It is also used to dissolve other substances.
Validity and Reliability. . . . . The principles of validity and reliability are fundamental cornerstones of the scientific method. This article is a part of the guide:
Science theory concerns itself with the possibilities and the limits of scientific knowledge. Science theory concerns itself with the possibilities and the limits of scientific knowledge. The basic assumptions of a theory are discussed, applicable methods for increasing manâs knowledge are explained, and, eventually, the validity of scientific pronouncements is reviewed and evaluated. Some basic principles (P1âP11) are enunciated below: P1: Every theory requires basic assumptions (a priori postulates) which cannot be proved. These presuppositions are not observable, but are of a metaphysical nature (Greek: metÃ  tÃ¡ physikÃ¡ = above physics, i.e., not based on observation).