 A somewhat different concern about the adequacy of connectionist language processing focuses on tasks that mimic infant learning of simple artificial grammars. Data on reaction time confirms that infants can learn to distinguish well-formed from ill-formed sentences in a novel language created by experimenters. Shultz and Bale (2001) report success in training neural nets on the same task. Vilcu and Hadley (2005) object that this work fails to demonstrate true acquisition of the grammar, but see Shultz and Bale (2006) for a detailed reply.