 Another strategy would be to propose that some thought symbols are complex and can decompose into meaningful primitive constituents. One could then allow that “X” is a kind of abbreviation for, or logical construction of, or defined in terms of “Y1,” “Y2,” and “Y3,” and that a causal theory applies to “Y1,” “Y2,” and “Y3.” So, for example, one might have a thought of a unicorn, but rather than having a single unicorn mental representation there is another representation made up of a representation of a horse, a representation of a horn, and a representation of the relationship between the horse and the horn. “Horse”, “horn”, and “possession,” may then have instantiated properties as their contents.