eg If you see a bunch of beer cans in a bath full of ice you can read the brands on most of them because you've seen them before. You don't think "that says V on it from this angle but I can't see the B so maybe it's not there ."
Another example may be seeing a girl sitting at a table. You don't tend to look under it before you conclude that her bottom half is actually there.
Here are some less stupid examples.



