Sun/Mercury one or two degrees from the Sun is called “Mercury Cosimi”. May indicate someone who may not be able to listen well (i.e., they may be answering you alreadyin their head … lots of mind chatter and static).
Mercury/Mars: Ok, wait a minute. Who’s crazy here?!?
Mercury/Jupiter: May be sensationally telepathic.
Mercury/Uranus: brilliance or eccentricity, depending on other factors in the chart, also dyslexia and other learning disabilities; a possibility also of nervous disorders such as MS.