The purpose of this paper is to point out the logical priority of the existential grounds of picturing reality by means of scientific representations, hypotheses as such. Also, to clarify the meaning of the inscribing and reading of the picture in terms of the existential conditions and facts of the human being who acts and reacts for survival, and who interprets its surroundings in connection with the train of consequences that connects up with this human action. The surrounding world thus (...) is recognized and interpreted in terms of playing and operating with signs, the significations of which make up the horizons of the world of the human being. This clarification is needed to throw light on how concepts mean in the application of words in language. And the clarity reached at this stage helps for us to clarify further the meaning of thinking and its relation to language-use in terms of playing and operating with signs in the conditions of the surrounding world, the action of the human body in its existential situation. Hence, the logical priority of the human condition in terms of the use and application of signs in the existential world of human being differs from the analytical representations of the world in science for scientific purposes. Which means that the representations of science are tools of the language, and that they are to be treated and interpreted as signs used to represent reality only in the scientific contexts, for the purposes of the language of science and scientific culture. Without such clarity, representations of science, scientific descriptions of reality are open to misinterpretation even by scientists and philosophers, let alone layman, to be so generalized to extend the bounds of its meaningful application in the scientific context of explaining or describing phenomena experimented, or observed under certain experimental conditions. (shrink)