Their saying that commanding something is a prohibition of its opposite: Is this correct, and what is the detailed investigation of it?

The questioner : We read in the university that they say in the principles of jurisprudence, the rule is always... I don't know if it aligns with the correct creed, meaning, does it align with the rulings of the Shari'ah? Their saying that commanding something is a prohibition of its opposite: Is this correct?

The Shaykh : That commanding something is a prohibition of its opposite is what appears to be the case.

The questioner : Meaning, is there a detailed investigation on your part, and is it ordinary?

The Shaykh : No, I do not have a specific detailed investigation; this is what we read. So do not seek more from me on this issue, because I have no more to offer.

The questioner : May Allah bless you.