God does not lie?<quoted text>
It is relevant.
God operates within certain guidelines. For example, when He covenants with us that if we do a certain thing, He will bless us with a certain blessing, He is then bound to come through on His end if we come through on ours, or else He lied and would cease to be God.
He must operate within the realm of righteousness or He would not be worthy to use the priesthood power and He would cease to be God.
Part of righteousness is performing acts that further righteousness. Idleness and acts that produce nothing, serve no purpose and therefore would be taking time away from righteous acts that He (or we) could be performing. Therefore it would be against the will of God to make a rock for no righteous reason. Testing God with such a statement is unrighteous and a waste of time to ponder. This is why my answer is relevant to your question.
It's not that I'm twisting your question into a pretzel. It is that your lack of knowledge about God leads you to ask the wrong questions.
1 Kings 22:23
Now, therefore, behold, the Lord hath put a lying spirit in the mouth of these thy prophets, and the Lord hath spoken evil concerning thee.
2 Chronicles 18:22
Now therefore, behold, the Lord hath put a lying spirit in the mouth of these thy prophets.
Ah, Lord GOD! surely thou hast greatly deceived this people.
O Lord, thou hast deceived me, and I was deceived.
And if a prophet be deceived when he hath spoken a thing, I the Lord have deceived that prophet.
2 Thessalonians 2:11
For this cause God shall send them strong delusion, that they should believe a lie.