 The test has certain weaknesses. In actual utterances, intonation can be used to indicate an assertion or an each question (‘Ben wanted to eat that?) conjoined with ‘Ben wanted to eat that’ yields an infelicity even if the demonstrative has the same value on both occasions – though we may try to fix things up by demanding that the test be run using common intonation (at least in spoken uses of the test!). On that note, the test will judge demonstrative and indexicals to be ambiguous since they are famously not generally conjunction reducible. Similar worries concern polysemy and ambiguity, which conjunction reduction may be overly sensitive to (See Viebahn (2016) for relevant considerations).