An open ending can produce a conversation in which everyone seems to have watched a different film. Often the disagreement lies less in the final images than in the conclusions drawn from them. Before searching for the single correct explanation, describe what is actually shown and heard. Somebody leaves a room; whether they return is already a further assumption.
Identify the unresolved question
An unspecified future is not necessarily an unsolved puzzle. A film can finish a conflict without explaining the rest of a character's life. An action may also be clearly completed while its moral significance remains disputed. Name the uncertainty: does it concern an event, a motive or the meaning of a decision?
Imagine two estranged friends finally sitting at the same table without speaking. Their presence together is established. Reconciliation, exhaustion and a temporary truce are possible interpretations. The plausibility of each depends on earlier scenes, not simply on the fact that both people occupy the same frame.
Find evidence for each reading
Formulate two different explanations and identify a specific clue for each. A gesture, recurring object or previously stated intention may support a reading. Then ask which detail that explanation struggles to accommodate. This distinguishes an account that brings observations together from one based mainly on a hoped-for outcome.
An elaborate theory is not automatically more convincing. If it requires several unseen events, acknowledge those as additions. A director's interview can also be interesting, but it does not retrospectively change the information supplied by the film itself. Discuss the two levels separately rather than treating an external statement as something every viewer should have known.
Check the version before continuing the argument
Older films or works revised for different releases can have alternative endings. The BFI analysis of the Bergman-Rossellini films demonstrates how these variations alter interpretation. If one person remembers an explanatory voice and another does not, check the editions used before dismissing somebody's recollection.
The conversation need not end in a vote. A useful shared finding might be that everyone agrees about the final action but disagrees about its significance for the relationship. The discussion has become more precise even though the ending remains open. Someone who finds the uncertainty unsatisfying can also identify the particular expectation that was raised earlier and left unmet, rather than dismissing all ambiguity as a missing conclusion.