Without the instruments working the blinding lid ends up teaching the exact opposite of the intended lesson.  With the lid closed and the instruments missing you are left with trying to detect what was happening by your sense of balance which is precisely what that mode is trying to train pilots to <b>stop</b> doing. <br> <br>In lid-closed mode you are supposed to be training your subconscious brain to believe the instruments before it believes what it feels like gravity is doing.<br><br>In a real plane the direction you feel the G's pulling in you is completely wrong.  You could be upside down but feel right side up if the loop is tight enough.  In a well coordinated turn you'll feel level despite being in a bank.<br><br>So the fact that the simulator has the G's all wrong is actually kind of okay given its purpose is to make you destroy your instinct to believe that sensation.  That is, if the simulator instruments are working.  When they're not working you get the impression it's trying to teach to you rely on feel <b>more</b> which is the opposite of what it's for.<br><br>And it's not really about cognition but rather it's about remapping subconscious instinct that's not under your control.  The only way to train your dumb instincts to do the right thing is through repetition.  Like learning to type, memorizing the keyboard layout doesn't help you type fast.  Repeating practice until your subconscious moves your fingers for you does.