1) What is the "accumulation of errors" account, and why is it not a sufficient account of sound change? 2) How does variability in American English s-retraction suggests a solution to the actuation problem? Briefly summarize Baker et al's argument regarding when sound change is expected to happen (and when it's not) 3) Does/Can Baker et al's account of sound change "work" with Exemplar Theory? If yes, say how. If no, say where the inconsistency is. 4) What are two questions you had about this paper?