Dimension jump

Is not the received knowledge about a 5th dimension a bit crass?  Why is it that beyond length, breadth, depth and time a decision by a human being should 'create' another universe simply by making a decision?  Why should all that matter be created or split or whatever it is (I have not read much science fiction on this, can you tell) by a person making a decision?  What about a horse making a decision, or a cat or a dog or an insect, in the latter case onto whom we do not bestow the belief that they are consciously aware of it.  A weakness in the plot as well as in my understanding?  Possibly.  Either way, I have a theory.

          I think it is more plausible that a fifth (or sixth or seventh) dimension might be explained a bit more fundamentally.  First, a basic analysis of the dimensions known and their progression.  Area requires length in order to be explained, but is not entirely explained by it.  There is an additional level, something that sets it apart that is perhaps not so easy to put into words.  The same comparison can be made between area and volume, and between time and volume.  One interesting description of time is that it stops everything happening at once.  It is based presumably on the premiss that time is a line (rather like dimension 1...?) and so if time did not exist, but the events that are distributed within it and the time they take do still exist, they would be on a dot rather than a line.  Anyway, where would time, volume area and length take us?  Well, nowhere beyond that -- we require another dimension (Ha! you were not expecting a Victorian wit were you) for that.  What about life?  The concept of being alive.  It cannot be explained by the others, they do not inspire its existence, it is above it.  Is that the sixth dimension?  It makes a certain amount of sense but somehow does not sit perfectly.  If we extrapolate further however, to a seventh dimension, perhaps the power of thought is that.  An Amoeba fulfils six dimensions satisfactorily by this reckoning.  Living organisms with conscious decision making processes (even if many are decided for the by instinct -- you have to have some of this in the present system.  Entirely free will just would not fit now would it?) form the next dimension.  I wonder if being alive mirrors area in the way that time reflects length.  That fails to sit very well either, however somehow thought reflects volume rather neatly I think.  What about an 8th dimension then.  What could reflect time?  Perhaps nothing.  Either because what I have written is drivel or because it is not within us to witness/interact/take/understand the 8th dimension.  An Amoeba can be involved (it is by virtue of my thinking about it now) but it cannot understand it.  Perhaps people are like that but of the 7th dimension, with no understanding or even sense of the 8th, nor any ability to know/assimilate/deal with it.  You can see I am struggling for words here.  Again, by my reckoning that is because these ideas are drivel, or because me gesturing towards it (and you reading this) invalidates an 8th dimension on those grounds alone.  No?  Somehow I have got myself in a slightly knotted-making position philosophically.  Can you do better?