The contract specifies that the oil is fungible and any sweet crude can be substituted.
We most prize non-designated gifts, as the money is fungible and can be used wherever the need is greatest.
The performance of Walsh’s quarterbacks suggested a radical thought: that in the most effective passing attack in the NFL, and on one of the most successful teams in the history of pro football, the quarterbacks were fungible.
Michael Lewis -- The Blind Side
They accepted as plain truth the widely held view that they were the team’s most fungible members.