ScienceDaily — The healthy brain is in a constant struggle between learning new experiences and remembering old experiences.

Virtually all social interactions require the rapid exchange of new and old information. For instance, normal conversation requires that while listening to the new information another person is providing, we are already retrieving old information in preparation of an appropriate reply.

Yet, some memory theories assume that these different modes of memory cannot happen at the same time and compete for priority within our brain.

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