Can specialized cells be differentiated further?

Advancells

New member
We have been learning this through years of our academic sessions that specialize cells have limited life span and cannot be differentiated further. In that case, why is it being said that every organ has a regenerative capacity. In fact, with only 25% functional capacity, the liver can be regenerated entirely to offer 100% functional output. Isn't it contradictory?
 
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