What would be the difference between the player that has the PHB completely memorized verus the player that looks up spell information at the table?
By not letting a player not look up a spell is sort of a penality to that palyer. If you don't want your players looking up spell info, don't give them the names of the spells cast. Give them the discription of the effects.
Personaly, I have no problem with players using any information out of the Players Handbook at any time. My goal as a DM is to make it hard for them to notice that there was an Anti-Magic Field. Spells just fail
Now, using the Monster Manual durring a combat is frowned apon. But I get around that by not using things out of the MM without some alteration.
-The Luddite
By not letting a player not look up a spell is sort of a penality to that palyer. If you don't want your players looking up spell info, don't give them the names of the spells cast. Give them the discription of the effects.
Personaly, I have no problem with players using any information out of the Players Handbook at any time. My goal as a DM is to make it hard for them to notice that there was an Anti-Magic Field. Spells just fail
Now, using the Monster Manual durring a combat is frowned apon. But I get around that by not using things out of the MM without some alteration.
-The Luddite