\input zb-basic \input zb-ioport \iteman{io-port 05960485} \itemau{Moelius, Samuel E.III; Zilles, Sandra} \itemti{Erratum: Learning without coding.} \itemso{Kivinen, Jyrki (ed.) et al., Algorithmic learning theory. 22nd international conference, ALT 2011, Espoo, Finland, October 5--7, 2011. Proceedings. Berlin: Springer (ISBN 978-3-642-24411-7/pbk). Lecture Notes in Computer Science 6925. Lecture Notes in Artificial Intelligence, 452 (2011).} \itemab Summary: Our ALT'2010 paper claimed that every computably finitely thick [LZ96, Definition 9] class of languages can be identified by enumeration operator [MZ10, Definition 1(e) and Theorem 12]. However, this is, in fact, false. We intend to include a proof of the claim's negation in the journal version of our paper, which has been submitted. \itemrv{~} \itemcc{} \itemut{} \itemli{doi:10.1007/978-3-642-24412-4\_35} \end