Cpu46 said:
Well lets look at it this way. Imagination is a lot like dreaming. You can really only imagine or dream what you have experienced. The form and construction of the experiences may be new and even outlandish, but everything is based off of a real interaction. A person blind since birth can not dream or imagine images or color since they have no frame of reference. In order to imagine that you are interacting with someone you must first have actually done so. Therefore everyone can not be a figment of your imagination since without a real person to base the interaction there would be no way to imagine more interactions. The chance of you being able to imagine thousands of individual entities is extremely low. Therefore, while there is a chance that I do not exist, it is highly unlikely.
TL;DR
You can't imagine something that relies on stimuli that you have not experienced, therefore my existence is highly likely but not guaranteed.
Untrue. There is no fact backing up that I can't imagine things I have not experienced. I have never met a mermaid, yet I can imagine one. I can imagine a pigmaid (that's an antromorph-pig with mermaid fin), and I have never even seen one in a cartoon.
One can imagine almost everything, and construct it from previous things you have experienced, even if they are not the exactly what you experienced before.