Skeptical of diachronic semantics because you can't ask speakers of, say, Middle English, for truth value judgments? In this new (paywalled) paper we show how the conditions diachronic semantic change can be tested using experimental synchronic methods: https://doi.org/10.1075/elt.00065.erb Preprint: https://www.uni-saarland.de/fileadmin/upload/lehrstuhl/gergel/publications_gergel/Modal_development_experiments.pdf