 Buras (2009) presents another argument that is perhaps best thought of as providing a novel reason to think that causal theories of mental representation only offer sufficiency conditions on meaning. This argument begins with the premise that some mental states are about themselves. To motivate this claim, Buras notes that some sentences are about themselves. So, by analogy with, “This sentence is false,” which is about itself, one might think that there is a thought, “This thought is false,” that is also about itself. Or, how about “This thought is realized in brain tissue” or “This thought was caused by LSD”? These appear to be about themselves. Buras’ second premise is that nothing is a cause of itself. So, “This thought is false” is about itself, but could not be caused by itself. So, the sentence “This thought is false” could not mean that it itself is false in virtue of the fact that “This thought is false” was caused by its being false. So, “This thought is false” must get its meaning in some other way. It must get its meaning in virtue of some other conditions of meaning acquisition.