Transparent Intensional Logic (TIL) is an expressive logico-semantic system intended for the analysis of natural language. Its foundation is a functional, type-theoretic approach that systematically distinguishes between an object and the way in which that object is determined (a so-called construction). TIL works with the notions of intension (a meaning that depends on the possible world and time) and extension (the value of an intension in a given world and time), which makes it possible to model the meaning of sentences in different contexts. To do so it uses a rich hierarchy of types and the apparatus of the lambda calculus, thanks to which it can analyse semantically complex phenomena such as propositional attitudes, indirect speech or anaphoric reference precisely.
Imagine talking about the planet Venus. You can call it the “morning star” or the “evening star”. In both cases you mean the same object, but you are using two different descriptions, two different “ways of getting to it”. Transparent Intensional Logic is like a special grammar for computers that helps them grasp these differences in meaning precisely. It lets them analyse not only what we are talking about but also how we are talking about it, which is crucial for understanding complex sentences and nuances in human speech.