Only partly true. You left his trademark on the graphic, but you did not note in any text that credit for the posted graphic belonged to "Registered". It is common practice and good manners to give credit to borrowed material.
As for my being a "dolt", I really don't care what you think of me. You are a "Zero", pun intended.
No, it's entirely true. If the definition of plagiarism is beyond your limited comprehension I suggest you look it up.
Good luck!