Meaning:
being able to take either side on any contentious issue.
The importance of “argument on both sides” derives from the assumption that there are few debatable matters that can be settled simply by mustering the facts for and against. More usually, opinions on one side or the other of any argument are formed, and audiences swayed, on the basis of astute manipulation of limited evidence, backed up by an array of persuasive tactics, designed to construct a convincing case.
- Taken from this BBC NEWS UK article
