Clone this wiki locally
The claim checks out only if extended equality produces a truthy value.
(fact (nth-prime 100) => odd?)
The claim checks out only if extended equality does not produce a truthy value.
(fact (nth-prime 100) =not=> even?)
The left-hand side is macroexpanded and compared to the right-hand side:
(fact (when true 3) =expands-to=> (if true (do 3)))
Note that neither side is quoted.
Acts like future facts in that it produces a "WORK TO DO" message. This is useful when you've got most of the claims in a fact working, but have to defer finishing one or a few.