Originally posted by magatsu1
previous event true delay-> ship n not dead.
but variables would be the more interesting way todo it.
And karajorma might not talk to me again if I talked you out of using variables...
No I won't

Personally I believe in using the best tool for the task.
is-previous-event-true is very useful when you're making missions for a campaign. It has an advantage over persistant variables in that when you see
is-previous-event-true
--Mission Name
--Event
It's pretty easy to tell what the event is checking for. This is very useful when you're checking someone else's mission or when you've forgotten exactly how you put the mission together. If you use a PV you have no idea when the variable was set or what the possible range of values for it can be.
However. Persistant Variables also have advantages. Firstly PV's are much simpler if you you're dealing with something like hull strength or percentages of ships destroyed.
Secondly I have no idea what is-previous-event-true defaults to when you play the mission in the tech room.

Where as a PV defaults to whatever you set the default to be in FRED (This is easily changed too). This is useful when playtesting a mission where the PV has been used to set a ships hull strength for instance.
Basically its a case of using whatever you feel works best
