[raiph]

I noticed that error too but decided I didn't have the energy to provide a response worthy of the situation.

I'm so glad I didn't try. As always you've provided a helpful answer and I learned something new. I hadn't twigged that `[...]` context would treat each Whatever as the same value -- though in retrospect I can see of course it would given the Perlish principle of doing something very useful rather than doing something useless (generating an error).

I noticed what looked like a mistake in your post:

    my &c = (* > 10) × (* %% 2);

    say so c(10,2); # True

I thought "surely that returns False" and when I tried, it did.

[b2gills]

Right it was late, and I was writing the code in different ways when writing here and writing in the REPL.