There was an example in Socher's paper of a tree of logic - ands, ors, nots (not shown on that site, but in the paper) - which logic, he showed his RNN technique can represent. The OP paper I imagine is more along those lines. Being able to capture full logic like that gets you that much closer to being able to extract the full meaning from language, not just words that provide a general flavor.
http://www.socher.org/index.php/Main/ParsingNaturalScenesAnd...
There was an example in Socher's paper of a tree of logic - ands, ors, nots (not shown on that site, but in the paper) - which logic, he showed his RNN technique can represent. The OP paper I imagine is more along those lines. Being able to capture full logic like that gets you that much closer to being able to extract the full meaning from language, not just words that provide a general flavor.