Mercury Opposition Uranus
Know someone with the opposition. And also one with the square, while Mercury also conjuncts Saturn and Neptune.
The description "egotistical" applies. Yet what's really happening with Uranus is that they have this uncontrollable urge to "express" themselves and force out whatever they are thinking, regardless of timing, feelings or appropriateness.
However communication is always, always a two way street, its never a one way street. Timing and word choice are critical. Communication is about understanding, being receptive to the other party, then very carefully choosing words that's only relevant to the situation at hand. Words and timing can both hurt and harm. Their urge is also different than the Sagittarius foot-in-the-mouth disease, which is motivated by truth. Their's is more inherently selfish in nature and only motivated by free and personal expression,
regardless of consequences.
Hence they can come off across as "egotistical", "offensive", "difficult" and unlikeable. They tend to have problems not understanding why people react negatively to them.
I've noticed in real life, it's definitely a handicap. As communication skills are essential for many areas of life to go smoothly.
Another problem they face is that their communication is not linear or step-by-step. It comes out scattered and seem to make little practical sense.
Yet they are actually
very intelligent in comprehension. If you throw them a curveball on abstract ideas that others will dismiss, they are usually the first ones to "get it". Its just that their thought process isn't linear.
I have this one and I've studied others that have it. Its kind of interesting as this trait is almost the anti-thesis of Mercury Oppose or Square Uranus.
This position needs structure (and just by itself and not influenced by other aspects), it needs linear, step-by-step, structure to learn new subjects.
However most things in life will never be linear. In school, you are thrown all types of subject matters with different teachers who teach in different styles. It will never be in the step-by-step process or with enough time to digest that Mercury Saturn needs.
So Mercury-Saturn has an opposite type of struggle in that it can come off as dumb and slow during youth. And then narrow minded in adulthood. I suppose the narrow-mindedness may seem "egotistical" as they can reject and block anything that doesn't go through their linear filter system.
Yet what's really happening underneath all this is that need for structure and a linear process again. Once the natives learn that they have their own mental footprint (their own brain stamp) to learn things, and then translate any subject matter into their personal, step-by-step process in a linear fashion, they can pretty much master and grasp anything.
In fact, they actually end up being the very best teachers because they've had to process the complex into a simple, digestible process for they themselves to understand it. So that any course or things they teach, ends up being the most effective. Eventually they realize if they work with their traits and use it right, they have an ability to translate the complex into something simple, which is actually a talent.
But getting to that point of realization is the challenge. And synonymous with the interpretation of the square, it is a difficult route. Once they get there though, they realize not only are they not dumb or slow, they are actually very intelligent, and also own a certain amount of mental depth that others lack. All it really was-was that-they simply didn't know how to tinker with their natural brain stamp. Its like a process of self-discovery and no one gives you the map, so you trip many, many times before you figure it out.
So both positions have different challenges caused by different underlying mechanisms. The afflictions do not impact their intelligence per se, but they just have certain challenges to work though.
Can't comment on the moon-mercury or neptune-mercury, as I lack real life examples to understand the underlying mechanism of how they works.