- it is considered to return 1 (when the two tests fail, the last
- computed value is returned, which here is "$x > 0.9" evaluated in
- the scalar context of the test), 2 or 3 arguments each with
- probability "1/3".
+ it is considered to return 3 scalars with probability "1/2", 2 with
+ probability "1/2 * 1/2 = 1/4" and 1 (when the two tests fail, the
+ last computed value is returned, which here is "$x > 0.9" evaluated
+ in the scalar context of the test) with remaining probability "1/4".