Which means between 76% and 10% does not have one. The median here being ~43% we can say less than half of the people dying by suicide have a mental illness.
So according to this the following statement is true: "A person who commits suicide may or may not have a mental illness, there is no way to tell. It's 7% more likely he does not.".
I personally think this is bullshit though. What kind of statistics is this?
Edit: I suck at maths so I can be totally wrong here.
The person making the argument mental illness means you cant make descions is generally applying double standards and arbituary lines whenever convient for them. Studies show between 24-90% of people who die by suicide have some form of mental illness. However for the sake of argument we will say pretend evreyone who dies by suicide is depressed. Optimism and depression are both not accurate pitcures of reality. An accurate picture of reality is somewhere in the middle. I will leave whichever is closer to reality up to you to decide.
On the extreme end of optimism we have infactuation. Infactuation clouds your judgment to the point of insanity in many aspects. By definition it causes the individual not to make sound judgments and lights up many of the same parts of the brain as insanity. I have never heard some one argues when you are infactuated you should not be able to make descions. Yet many of these same people will argue you should not be able to make descion when you are depressed. It would be very hard to argue depression effects your brain remotely near as much as infactuation. With some experts thinking in many aspects depressed people see reality more accurately than the average person.
Does anyone see reality accurately? Probaly not. Does anyone have perfect knowledge when making descions? No. So you can never always make perfect descions. Someone woild have a much easier time arguing thay Survial instinct darastically clouds our judgment. For instance SI is the strongest instinct, as such it could easily make it difficult to make an life or death situation. Their are also factors like pro life proganda, the fact its rubbed into most of us from an early age to die is a great tragedy and life is a great gift. (Even though by defintion in order for something to be a gift there needs to be a choice) Do these factors impact our descions to make life or death descions ? ofcourse they do. Do all these factors impact our descion to make a life or death descion more than depression? To me it seems almost certain these factors impact our ability to make life or death decions far more than depression. The argument seems to be "people should have extreme bias towards life, if you don't, you should not be able to make descions."