Forum:Remove from play rulings, need help to settle dispute

so this friend of mine,he plays with remove from play, has this idea that about what you can and can not do. He puts down dimensional fissure and gravekeepers serevant he claims i cant attack because i don't know if my top card is monster or not i always tought that you would pick it up look at it and if it is a monster you would remove it or not if it wasn't.

something simmilar happens when he uses the trap macro cosmo against my lightsworn deck(kicks ass) and claims i the milling effect can not happen beacuse it has to be send to the graveyard but are instead being remove from play.

this goes on and on with other cards that says that i "have to send to the graveyard" so please if you an oppinion or some type of official ruling help me out>

THANKS.