Cadets! This axiom may one day save your life: Phase first, ask questions later.
Is it an impostor? A clone or a hologram? Is it a chair or is it Odo? Too many questions! Now you're on your way to being composted into Ketracel.
Phase first, cadet! Phase like Tendi scans. Do not hesitate to phase out the answers to your questions. If a visiting Klingon does not remark, "There seem to be a lot of phaser scars on this station" you have not been phasing appropriately!
Do not wait for them to escape into a jefferies tube or Engineering. Phase them!
We have stun settings for a reason, people! Phase each other, play tag. But for Koala's sake, do not hesitate to fire. Our lives depend upon your itchy trigger fingers.