Those rats that selectively had all ripple events eliminated by electrical stimulation were impeded in their ability to learn from the training, as compressed information was unable to leave the hippocampus and transfer to the neocortex.
Probably remembered being electrically stimulated instead.
I think the experiment design eliminates that possibility. Why would this group of rats do worse than the ones that were electrically stimulated, but not in a way that disrupted the ripple events?
Probably remembered being electrically stimulated instead.