@cian
If (a big if) we performed generalisation at retrieval (rather than at storage, as in almost all current artificial neural networks) then the episodic memories would be the essential input to the generalisation (and inference) process. You are best placed to know what dimensions to abstract over when you have a specific current task and goal to drive generalisation and inference.
(Of course, having arrived at some specific generalisation from the current retrieval, that generalisation might be stored as part of the current episodic memory and be available to guide future generalisations on retrieval.)
What are the implications if episodic memory is the primary form of memory and other (declarative/procedural/etc) memories are epiphenomena arising out of the episodic memories?