Avicenna, beside his theoretical discussions about experimentation, practically applied his experimental method to natural sciences studies such as medicine, biology, and meteorology. His theoretical discussions subsume propositions concerning the conditions under which experimental knowledge is attained, the components of this knowledge and its functions. Some of these propositions are as follows: necessity of recurrent observations for acquiring experimental knowledge, certainty plus conditional universality of such knowledge, and its role as demonstrative premises. Investigating the application of his theory in natural sciences (...) propound two new features which were not elaborated in the theoretical discussions: fallibility of experimental knowledge and necessity of systematic observation. This research, using the analytic method and referring to both philosophical and scientific works of Avicenna, clarifies that a comprehensive definition of experimentation is dependent on considering extracted points from practical application of experimental knowledge, beside its theoretical components. (shrink)

Every normative claim is faced with the questions of how and why we should accept it. Jonathan Weinberg et al. think there is no good answer to these questions and call this the "normativity problem." I argue that if we try to posit that there is a problem of normativity, then logically we will fall into circularity – even if these questions of normativity do not have any answer. But there is still a problem that emerges in conflict resolution between (...) normative issues. To avoid circularity, I formulate this problem and call it the "revised problem of normativity." Next, I enumerate and assess probable responses to this revised edition of the problem. Finally, I defend "basic normative issue(s)" as the only valid solution to the revised problem as well as the possibility of a scientific surveyability of it (them). (shrink)