Since this is a public forum and some things can lead to long tangents, (I can go off on them easily as is evident) the reason I said it was another matter was not to sidestep those points or detract from them. In fact, I would prefer that people give more thought to ideas along those lines and investigate the matter of existence, being, etc.
For a "mind" it seems almost a waste not to contemplate being, existing, experience, itself, etc. Although separation can be an essential problem to investigate, isn't it fascinating that we, as human beings, can manage to exist in a way that feels separate from everything else, and not even imagine that it could be any other way or that it is a product of a tenuous dualism? Then, we also manage to project that out for the sake of survival and convenience on our environment. The reason I bring that up is that the subject/object relationship is a good place to look.
Yes, going in circles is cyclic and straight lines are linear, hmmm. A to B or round and round? Now, if I would have gone into a tangent to respond to that, it would have been far too long and out of context.
I think honing in on common interpretations of words like abstract and concrete and existence could be helpful because they tend to be used in a reflexive way and we make a lot of assumptions regarding their relevance. For topics like this, defining the terms can sometimes help.
Of course, real vs. imagined, or actual vs, reality, etc. Well, those are other matters, too, but they provide some fertile ground for contemplation. I am not a relativist unless it involves relative things. 
Thanks!
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