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<p>I understand what you’re saying, but according to the Williams CDS, the school does not consider the level of the applicant’s interest in making admissions decisions. OP wasn’t asking about whether or not there was a better chance of acceptance applying ED vice RD, the question was whether or not an early submission of SAT scores would help by demonstrating interest. If you accept Williams at their word based on the CDS (and I have no reason not to), then the answer is very clearly “no.”</p>