What is qualifier?

A qualifier is a word that limits how strong a claim is: some, most, many, often, usually.

The LSAT tests whether you respect them. "Most voters" does not mean "all voters," and evidence that proves "some" effect does not prove "most."

Mismatched strength between evidence and conclusion is a constant trap: the evidence supports a weak claim, the conclusion makes a strong one.

When in doubt, read the qualifier literally. The test rewards literal reading.