Passage Summary: We can't copy old, rotting movies to new film fast enough, so some of those old movies are going to disappear.

Conclusion: It is inevitable that some early Hollywood films will be lost forever.

Reasoning: Preserving these films requires a slow and expensive transfer process that cannot be completed for all films before the original nitrate material disintegrates.

Analysis: The argument relies on the assumption that the specific method mentioned—transferring to acetate film—is the only way to save these movies. If there were a faster, cheaper, or alternative method of preservation, the conclusion that some films *must* be lost would no longer be certain. To find the necessary assumption, use the negation test: if we assume there *is* another way to preserve the films, the argument falls apart. Look for an answer that confirms no other preservation methods are viable or available in time.