There are three crates of fruit and one of them has apples in it, one has oranges in it, and the last one has both apples and oranges in it. You can see that one of the crates is labeled "A" for apples, another is labeled "O" for oranges, and the third is labeled "A+O" for both apples and oranges. All the labels are incorrect, you may pick one crate and have a fruit pulled from it. How can you determine—without a doubt—which crate has apples, which one has oranges, and which one has both?