Browse by Topic

Linguistics and Symbolic Computation in a World of Large Language Models

Graf, Thomas

Abstract Language has always played a central role in artificial intelligence, yet AI researchers and linguists have rarely seen eye to eye on things, in particular the status of subsymbolic/neural approaches to language. After decades of debates, it looks like the subsymbolic approaches have finally emerged victorious. Not only are large language models (LLMs) succeeding in incredibly complex real-world tasks, subsymbolic models are also rapidly gaining traction in some areas of theoretical linguistics, e.g. lexical semantics. This raises the question: will symbolic linguistics be left in the dust, or is this actually an opportunity for meaningful synergy between symbolic and subsymbolic approaches? In this talk, I argue for the latter by presenting “subregular syntax” as a concrete example of what such a synergy may look like. Subregular syntax is a symbolic approach that combines formal language theory with the Minimalist syntax framework proposed by Noam Chomsky, which grants it a large degree of empirical coverage across a wide range of typologically diverse languages. Despite that broad coverage, subregular syntax is a very simple formalism that analyzes all syntactic dependencies in terms of relativized adjacency conditions. Even though these conditions are stated over trees, they can actually be reduced to a very specific types of n-grams over strings. This opens up a new way of representing sentence structure in neural networks while bringing robust learning algorithms like stochastic gradient descent to Minimalist syntax. It also casts doubt on claims in the literature that the behavior of neural networks in specific linguistic tasks, e.g. binding or NPI-licensing, shows that they use tree structure. Instead, these findings may be indicative of a network’s ability to use fairly elaborate types of n-grams. The careful study of the symbolic approach of subregular syntax thus is an opportunity to deepen our understanding of neural networks while also harnessing their advantages for theoretical linguistics.

Files [pdf]

@misc{Graf23OFAItalk,
    author    = {Graf, Thomas},
    title     = {Linguistics and Symbolic Computation in a World of Large Language Models},
    year      = {2023},
    note      = {Invited talk, December 20, Austrian Research Institute for Artificial Intelligence (OFAI), Vienna, Austria},
}

links

contact