Cyanide has an LD50 (50% chance of death) in the 1-2 mg/kg range when taken orally. So middle for taking cyanide is probably 1.5mg/kg. 90mg for someone 60kg.
Sadly the middle ground in other topics is less easy to define!
Bottom is 0? Or is 1mg? Or what?
Top is killing a human by dose? Killing an elephant dose? Make you feel dizzy?
What’s too much? What’s being in the middle?
You see, it’s a stupid logic “in the middle”. The point is being in the middle or moderate is not always “good”.
Also it’s hard to define. Tbh only non logical people throw words like “in the middle” etc