I think with the other post it might be important to know which two cards were left behind? But that is a different scenario to permanently losing a card and 1) knowing about it or 2) not knowing?
If you are using a large spread then I think it can matter, and also if it were a Major card then I would take interest of which one it was and if it was relevant.
One theory might be that the cards will tell their message whatever.
Another might be that the reading will be skewed if the missing cards were needed.
When I reorganised my lounge for Christmas I found a card underneath the settee, the deck I have been very successfully reading with for the past year. The card was The Magician. Perhaps because this is a card whose meaning could be 'replaced' by others it did not matter? Perhaps none of the readings I gave needed the card?
I think that the crucial point may be whether we know or not?
If we find out that there are cards left in the box when we go to replace the deck after a reading, might we doubt that reading then? I think I would.
Interesting question
![:)](./images/smilies/001.gif)