The syllogism is a staple of Aristotelian logic. Generally consisting of two premises and a conclusion, a syllogism determines if a conclusion is valid or not based on the initial premises. (It cannot tell you if a conclusion is true or not, however; a conclusion can be valid but false if one or both of the premises contains an error of fact.) Sample valid syllogism: "All flowers have petals." "A rose is a flower." "Therefore, a rose has petals." Sample invalid syllogism: "All flowers have petals." "A rose has petals." "Therefore, a rose is a flower." (While it may be true that a rose is a flower, one cannot draw this conclusion from the information provided. The premises do not preclude the possibility that a rose is some sort of non-flower entity that also has petals.) You can try your hand at identifying valid and invalid arguments by playing this (timed) logic game: www.philosophyexperiments.com/validorinvalid/Default.aspx
Leave a Reply.
Blog sharing news about geography, philosophy, world affairs, and outside-the-box learning
This blog also appears on Facebook: