Imagine you're at a buffet with 17 identical plates of plain toast. You have 3 slices left. Do you:
Take 2 slices from one plate and 1 slice from another, thus creating 3 plates with varying levels of toast-fulness. Burn the whole buffet, because who needs toast? Call the toast police. Ask a friend to make the decision for you, but only if they're an expert in toast.