define warrant by toulmin
Toulmin's Schema: 1  Claim: conclusions whose merit must be established. 2  Data: the facts appealed to as a foundation for the claim.  Warrant: the statement authorizing the movement from the data to the claim. Toulmin stated that an argument is only as strong as its weakest warrant and if a warrant isn't valid, then the whole argument collapses. Therefore, it is important to have strong, valid warrants.