A horn-button works has a still, a care sentence, and a tap-test clip that might belong to three different buttons. What must be true before anyone discusses early, late, or intermediate fusion on those files?
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Short Explanation
Fusion talks about joining arms of one example. If the still, sentence, and clip might be three different buttons, pin them with a shared id first—then pick a fusion style.
Full Explanation
A multimodal fused example starts with a shared identifier that ties each modality file to the same object or event. Without that key, early, late, or intermediate fusion is undefined because the arms may not co-refer. Encoding choices and TTS rewrites do not replace the shared-id requirement.