The target article differentiates a new, syntactic component in verbal work
ing memory. We suggest that several more components could be differentiated
to make a model of working memory complete. Next, syntax is not always sep
arable from the subject's verbal memory capacity as measured by standard wo
rking memory tasks. Finally, interference between different processes canno
t be taken as evidence for the processes sharing the same resources. Interf
erence might be a result of active mutual inhibition.