My instinct is that basically everything real humans talk about in practice is reducible, with the exception of ought-statements, and even ought-statements are reducible if there is some clear goal in the context that all parties will agree with. When people talk, they are usually talking about something.

So, 137 are clearly just claims about reality. Reducing them should pose no difficulty. 10 is also a claim about reality, using "should" not in the sense of "ought", but rather in the sense of "would be expected to". 2 and 6 are technically-speaking value claims, but it should be pretty easy to agree on a shared basis for determining value that would let us evaluate them. 459 are value claims where the basis for determining value is likely to be more controversial. Eliezer believes in a fundamental human value system, but I'm more cynical. 459 strike me as unresolveable, even though they are not in principle meaningless. 8 is poetry, which violates the condition that it should be something "real humans talk about in practice". Much poetry is not meaningful in an ordinary sense, any more than a melody is meaningful.