ADDLE ~ sounds like riddle which is usually confusing and hence we get confused.
Ad + dull..for a dull person everything is confusing...
i am a fool=addle
addle-baddle (hindi meaning on one side and then on other side) so someone who goes on changing sides
a+ dull : rotten eggs always look dull.
Addle sounds like idle. If something is idle for a long time, such as food it becomes rotten.
addle sounds like idle ; idle means sitting without any work and hence as if confused by something.