LOL, let the biggest user of the 2 cards explain.
Simple......... Both reasoning and monster gate state the following bit
"flip till you reach a monster card that can be NORMAL SUMMONED and SPECIAL SUMMON it"
Therefore.... If you flip until bloo-d, etc, they will just keep on being flipped through as those cards cannot be normal summoned.
It is only in the situation of cards like antique gear golem, which can be normal summoned but may not be special summoned. Then will it flip to that card, and stop there, as it can be normal summoned, but yet cannot be special summoned.
If they still don't understand....... Point at them, laugh, and walk away.