The part of a system that is most likely to fail or cause problems.
It follows, too, that when there is a number of substances, all essential for the elaboration of living material, and when one of these is present in minimal proportion, that one substance rules the production, just as the effective strength of a chain depends on the weakest link.
Politicians are the weakest link in the chain because they can be so easily bribed, and backed with lobby material.
devilish thing about Weakest Link is that getting the answers right is only about thirty per cent of the battle.
evict a housemate, The Weakest Link wants us to pick on the less able.
Whilst Big Brother asks us to evict a housemate, The Weakest Link wants us to pick on the less able.