A node in the computed argument lens — the entry plus the one
structural fact the neutral default lens derives: whether it is an
open objection (an objects-to with no answering child). The lens
reads pure relations; it never reads up/down and stores no order.
A node in the computed argument lens — the entry plus the one structural fact the neutral default lens derives: whether it is an open objection (an
objects-towith no answering child). The lens reads pure relations; it never readsup/downand stores no order.