The raft of Thesus

A three part raft

_____________________________________________
_______________ Time line from earlier to later times

T1			T2				T3			T4

A			A				A			F
B			B				E			E
C			D				D			D


										A
										B
										C
										

Which is the same raft at T4 as ABC at T1?

FED the functioning raft which is modified from ABC step by step?

Or

ABC,

The original raft-pieces, now reassembled?

Suppose you purchase ABC. Do you own the original raft?

Both ABC and DEF at T4 cannot be identical with ABC at ABC at T1. So how do we choose?

Imagine a lawsuit after T4 between the owners of ABD and DEF. They dispute about ownership of the original raft.