Emores is an abductive morphological reasoning engine based on the Stuttgart Finite State Transducer Tools SFST. Its aim is to facilitate a guided brute force attack on a speciﬁc problem of word morphology in computational linguistics: extending the lexicon from corpus data. For a particular inﬂected natural language, it requires a hand crafted SFST ﬁnite state transducer and a seed lexicon covering all of its regular inﬂection classes. When fed with new word forms from a corpus text, it guesses which lemmas could have generated it (induction) and what other word forms could be explained with that lemmas (deduction). This generated data is written to the database and is analysed using SQL to measure the explanatory power of the guessed lemmas with respect to the corpora (abduction).