I don't know much about CAP but it doesn't sound right to me.

Let's see, you store your data tuple for example for a position say {X,Y} as 2 coordinates. X in one column and Y in another one.

Now when it gets updated concurrently and it needs to merge two conflicting {X1,Y1} and {X2,Y2} positions you could end up instead with {X1,Y2} non-existing/impossible/broken position.

Is that really that easily broken? Or am I not thinking about it straight.