What's in a title: Blade Runner

Blade Runner (1982)

In a dystopian Los Angeles of 2019, special police officers known as Blade Runners are tasked with killing renegade "replicants," artificial humans virtually indistinguishable from the real thing. Blade Runners need to recognize razor-thin distinctions between what is human and what is not; an error in judgement could mean the death of a real human. Because these decisions often need to be made quickly, before the sometimes-dangerous replicants can cause any harm, there is a narrow window of opportunity and little room for error. These officers, therefore, must metaphorically run along the "razor's edge," the edge of a blade.

What's in a name: Adam Gibson

Son of gib: cloned man, cloned cat

Adam Gibson - The name of the clone protagonist of The 6th Day. In a future where cloned pets can be purchased at shopping malls but human cloning is illegal, clone Adam is accidentally created after the original Adam is mistakenly presumed dead. Both Adams work together to prevent one of them from being killed by the corporation trying to conceal its mistake.

The name "Adam" begs association with the biblical first man, and clone Adam is a first as well — the first human clone who is allowed to live during the lifetime of his template. (Not coincidentally, the cloning occurs on original Adam’s birthday, which therefore becomes clone Adam’s birthday as well.)

"Gibson," or "son of Gib" implies "son of cat," as Merriam-Webster defines "gib" as "a male cat." The technology that was perfected in the cloning of animals (like the cloned pet cat given to Adam’s daughter) has given birth to the technology used to clone Adam. The cloned cat, then, is the predecessor or "parent" of the cloned human.

What's in a name: Liberty Valance and Ransom Stoddard

James Stewart as Ransom Stoddard,
Lee Marvin as Liberty Valance

Liberty Valance - An outlaw for hire who terrorizes the small frontier town of Shinbone, Liberty attempts to intimidate settlers into voting against statehood in The Man Who Shot Liberty Valance.

Ransom Stoddard - An educated man from back East, Ransom hopes to bring law and order to the West. He favors statehood as a way to protect settlers from unscrupulous ranchers.

Bad guy Liberty's name sounds positive, but the "liberty" he represents is unrestrained and unmediated freedom. Valance acts on his every whim and impulse, however violent, provided it doesn't interfere with his own liberty, regardless of how it affects others.

One of the definitions for "ransom" given by Merriam-Webster is "to deliver especially from sin or its penalty." Ransom Stoddard certainly provides (at least by appearances) a deliverance from evil (evil in the form of Valance), but also represents the "captivity" (to use words suggested by "ransom" or "holding ransom") of the freedoms we yield to the law in order to sustain a peaceful society. The killing of Liberty by Ransom (albeit in perception only) is symbolic of this giving up of unrestrained personal freedom for the common good.

See also: Great Showdowns: The Man Who Shot Liberty Valance