Suicide

[bennyboy]

People commit Premeditated murder all the time. It's called First degree murder and is a federal offense.  If you think that very few people "decide to murder", you apparently don't pay attention much. 

National Archive Criminal Justice Data website


Start there.

You are still applying a double standard. If a person who will commit suicide goes out and buys a gun, or a rope, or some duct tape for the hose running from his car exhaust, is this not proof of premeditation? And yet you will still, I presume, consider them lacking clear enough insight to consider fully the consequences of their actions-- though a murderer, buying those exact same items for the execution of HIS impulse, you will condemn on the grounds that this type of premeditation indicates sufficient self-control to establish moral agency.