3 ms·The thing is, wood trees don't share (or trade) leaves, but abstract trees can.by techbio 16y agoThe thing is, wood trees don't share (or trade) leaves, but abstract trees can.drdaeman 16y agoNo, they can't share leaves. Trees are acyclic by definition - no leaf may have more than one parent. Present-day hierarchical file systems are digraphs, not trees.techbio 16y agoYes, digraphs are much more flexible. Present-day wood trees -really, really cannot- share leaves.