Warrants. The “warrants” logically connect the observed data to
the claims. The need for elaborate warrants varies with the strength
of the link between the data and the claims to be made. Sometimes,
the link between the data and the claim is so clear that the warrant
becomes self-evident and requires little explanation. For example, it
is very straightforward to explain the logical link between a road test
that requires a test taker to demonstrate the ability to perform
typical driving tasks safely, and the claim that a test taker can operate
a motor vehicle without endangering the public.