21 grams
... that according to Snopes, the belief that the soul weighs 21 grams should not be given any credence?
... that according to <a class="mw-redirect" href="./Snopes.com" id="mwASo" rel="mw:WikiLink" title="Snopes.com">Snopes</a>, the belief that the <a href="./Soul" id="mwASs" rel="mw:WikiLink" title="Soul">soul</a> weighs <b id="mwASw"><a href="./21_grams_experiment" id="mwAS0" rel="mw:WikiLink" title="21 grams experiment">21 grams</a></b> should not be given any credence?