In real game, you are only allowed to inspect all the things which are shown on the table of your opponents. It means that you can inspect the top cards, the icons splayed, but not any information which are covered by cards.
Well, if anyone want to inspect the top cards, you may need to just read it on table but not pick it up. You may try to pick up all the cards in the same color, but it is quite impossible to do so anyway.
If I do not remember wrong, there is a rule that you cannot inspect any information which are covered. Hope anyone can find the rules on rule book.