Some Supreme Court justices are persons incapable of objectivity. All teenage suicides are tragic occurrences. No tragic occurrences are heroic episodes. No heroic episodes are teenage suicides. Some viruses are not things capable of replicating by themselves.
All viruses are structures that invade cells.
Some structures that invade cells are not things capable of replicating by themselves. No legally enforceable documents are guarantees of marital happiness. All prenuptial agreements are legally enforceable documents. No prenuptial agreements are guarantees of marital happiness.