For example, if someone says something like, "DNA is a long polymer of nucleotides that encodes the sequence of amino acid residues in proteins, using the genetic code."
You could say, "Actually, it's more like the nucleotides encode the sequence of amino acid residues in proteins, using the genetic code."
You should always talk very loudly when attempting this, so as to trick as many people as possible. This should result in conversations among other people like:
"Man, that guy sure does talk loud."
"Hell, I'd talk that loud too if I were as smart as him."