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Laura has to take 2 different kind of medicines (medicine 1, medicine 2). both look exactly the same (same weight, color, shape, size, etc…; i.e identical).
If she takes more than 1 medicine of the same kind per day, she will die. Furthermore, if she doesn’t take medicine 1 and 2 every day, she will also die.
Laura is on a limited budget, and since the medicines are extremely expensive, she can’t throw any of them away.
One day, she got distracted and by mistake put 2 medicines on the table. Since both medicine types look identical, she’s not sure which medicine is which.
Question: How can she manage to take the medicines without any further dire consequences and yet save the extra medicine?