Logical Reasoning

Logical reasoning — formal deduction, constraint satisfaction, and syllogistic inference — exposes a core weakness in autoregressive language models: they pattern-match rather than prove. Benchmarks like LogiQA, FOLIO, and the ReClor reading comprehension test push models toward deductive rigor, and performance improves substantially with chain-of-thought and self-consistency decoding. But systematic evaluations (2023-2024) show that even frontier models fail on problems requiring more than 3-4 reasoning steps, and neurosymbolic approaches that compile to SAT solvers or proof assistants remain more reliable for true logical correctness.