Conditional Sentences: Lecture notes on the analysis of condition sentences by Paul Kay.Conditionals and Counterfactuals: Essay by Hector Parr, considering some philosophical difficulties with `if'.Faithful and Fruitful Logic: Article by John Howes, presented at the 20th World Congress of Philosophy.Nomic Dependencies & Contrary-to-fact Conditionals: Essay by William S. Boardman discussing Fred Dretske's measles examples in his book `Knowledge and the Flow of Information'.Paradoxes of Material Implication: Lecture notes by Peter Suber.Peirce and Philo: Discusses Charles Peirce's account of conditionals, hypotheticals, and what he takes from Cicero's account of the debate between Philo and Diodorus.Relevance Logic: Article in the Stanford Encyclopaedia of Philosophy, by Edwin Mares.