If the building burned to the ground there will be only a pile of ashes and rubble. There is only a pile of ashes and rubble. Therefore the building burned to the ground. A teacher is speaking to a...

If the building burned to the ground there will be only a pile of ashes and rubble. There is only a pile of ashes and rubble. Therefore the building burned to the ground.

A teacher is speaking to a colleague about a particular student just before an exam and says, ‘Jones has worked hard so he will pass the exam.’