a. 可发行的, 可成为争论点的

Issuable \Is"su*a*ble\, a. [From {Issue}.]
1. Leading to, producing, or relating to, an issue; capable
of being made an issue at law. --Burrill.

2. Lawful or suitable to be issued; as, a writ issuable on
these grounds.

{Issuable plea} (Law), a plea to the merits, on which the
adverse party may take issue and proceed to trial.