What he wrote down,
Even though freestyles are assumed to be 100% off the top of the dome, that isn’t always the case. Some rappers write down and memorize generic one-liners before the battle, so that they have something to fall back on if they run out of ideas. You can’t get away with writing your whole rap since freestyling requires improvisation, but a pre-written line here and there isn’t as frowned upon.
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