Originally posted by CP5670
error (really stupid operator)
I think we have a winner! Why on earth would you ever need to use that SEXP? Even in mission testing it would be far more sensible to put a message in its place saying ERROR.

never-warp and allow-warp (break-warp/fix-warp do the same thing)
is-tagged (doesn't work and would do the same thing as has-been-tagged-delay)
is-iff (doesn't work)
ship-guardian/ship-no-guardian (basically the same thing as ship-invulnerable/ship-vulnerable)I`ve found uses for never-warp and allow warp. They are very useful in missions where you want the player to make use of a jump node. You could probably base a mission around a broken jump drive and thereby make use of break-warp so it isn`t completely useless.
I agree with you about ship-guardian what's the point in a SEXP that prevents weapons from doing damage but stil lets you get blown up by explosions and the like.
I haven`t bothered with the others you mentioned so I guess they really are useless
