=/ a [p=3 q=6]
p.a
faces can sit inside a cell: [p=3 q=6].
p.a is a wing: a dotted path that looks a name up in the subject.
glossary
=/ pins a named value (a face) into the subject for the lines below it.
name=value optionally declares the type.
=/(a 3 (add a a)) is 6.
:* makes a tuple of many elements, nesting to the right.
:*(1 2 3) is [1 2 3].
irregular forms:
[a b c d] is :*(a b c d)
^= binds a name (a face) to a value - the name=value you see in samples and pins.
^=(a 5) is 5, labeled a.
irregular forms:
a=b is ^=(a b)