Technically, logic cannot establish truth; logic can only establish validity. Validity is still useful. If an argument is valid and the premises are true, then the conclusion must also be true.

Richard Crider, Marvell's Valid Logic, College Literature, Vol. 12, No. 2 (Spring, 1985), pp. 113-121 ...

Logic tells you exactly when some conclusion follows from some premises and when it does not. It turns out that most arguments we encounter in everyday life are far from the ideal of logical validity.

Mind has long been the leading journal in philosophy. For well over 100 years it has presented the best of cutting edge thought in epistemology, metaphysics, philosophy of language, philosophy of ...

Fig 2. When a CMOS input pin is at logic high or low with low current, lots of current still flows between valid logic levels. This data is for the MAX5391 digital potentiometer.

We also follow Campbell and Stanley's contention that establishing the internal validity of a study or assessing bias is based on a logical process. Hence, the information needed to assess ...