What the Speaker Knows: Language, Compositionality, and the Limits of Explanation
1. A Capacity We Exercise Without Explaining It Imagine hearing someone say, “The astronaut left a sandwich beside the telescope.” You have never heard this particular sentence before, yet you can understand what happened and how its elements relate to one another. You do not need to have memorised the sentence in advance to grasp its meaning. This ability is part of our ordinary experience of language. We understand unfamiliar expressions, recognise relationships between words, and notice when a change in formulation alters what a sentence means. We can also distinguish between sentences that contain similar words but organise them differently. Our command of a language therefore extends beyond the expressions we have encountered and learned individually. What makes this possible? We clearly draw on what we already know about words and their use, but that knowledge must somehow enable us to interpret combinations we have never encountered. Describing the meanings of individual w...