Premises and Conclusions

Cards (11)

  • Deductive argument

    If the premises are true and the argument is valid, then the conclusion has to be true and the argument is sound
  • Inductive argument
    If the premises are either true or at least acceptable, then the conclusion is likely to be true and we consider these inductive arguments to be strong
  • Evaluating arguments
    • Evaluate the premises themselves on their own merits
    • Evaluate the logical link that connects the premises to the conclusion
  • Premises
    The evidence on which an argument is based
  • Evaluating premises
    • Determine whether they are true or false
    • Determine whether they are acceptable even if not provably true
  • Empirical evidence (observed facts) can be used to determine the truth of some premises
  • Some premises cannot be evaluated as true or false, such as moral/ethical claims, opinions, and value judgments
  • Premises that cannot be proven true or false should still be scrutinized and evaluated for their acceptability
  • Evaluating deductive arguments
    Look for whether the argument is valid - it is impossible for the premises to be true and the conclusion to be false
  • Evaluating inductive arguments
    • Look for whether the premises are relevant to the issue and conclusion
    • Look for whether the premises are sufficient to justify the conclusion
  • Inductive arguments rely on acceptable premises rather than provably true premises