What is the significance of dissenting opinions in appellate court decisions?
<p>Appellate courts often hear cases en banc and decide them by simple majority of the judges on the bench.  The majority will typically sign a single "per curiam" decision, which constitutes the judicial precedent (and hence law) on the question decided.</p>

<p>But judges who disagree with the majority opinion will often author dissenting opinions or statements which are published along with the majority opinion.  What significance, if any, do these dissents have for purposes of law?</p>

<p>For example, I was just reading <a href="https://www.brennancenter.org/sites/default/files/legal-work/LWV_v_PA_Emergency-Application-for-Stay-SCOTUS-final.pdf" rel="nofollow noreferrer">a filing with SCOTUS requesting an emergency stay of a Pennsylvanian Supreme Court decision</a>.  The filing includes not only the majority state court <em>per curiam</em> in question (ref A1), but also several dissenting statements from that court in that case (ref A5-).  Do those have any more weight before the SCOTUS than any other writing or argument that may be filed in support of the appellants' arguments?</p>

<p>Or, do dissents have any sort of intermediate authority – less than precedent, but more than any other argument would have solely on its merits – in terms of informing future legal decisions?</p>

<p>The decision of a court consists of several things:</p>

<ul>
<li>The orders made</li>
<li>A summary of the evidence</li>
<li>The judge's reasoning from the evidence to their conclusions of what the facts of the case are</li>
<li>The judge's reasoning from the evidence to their conclusions of what the law applying to those facts is</li>
<li>The judge's reasoning from those findings of facts and law to the orders that were made (<a href="https://en.wikipedia.org/wiki/Ratio_decidendi" rel="nofollow noreferrer">ratio decidendi</a>)</li>
<li>Reasoning on how things might have been decided otherwise (or the same way) if the facts or the law were different (<a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">obiter dicta</a>).</li>
</ul>

<p>We hope that the judge is articulate enough that we can tell which is which.</p>

<p>Where there is more than one judge there is more than one opinion. However, there is still <a href="https://en.wikipedia.org/wiki/Ratio_decidendi" rel="nofollow noreferrer">ratio decidendi</a> and <a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">obiter dicta</a> across all the opinions. Typically, a dissenting judge disagrees with the <a href="https://en.wikipedia.org/wiki/Ratio_decidendi" rel="nofollow noreferrer">ratio decidendi</a> in whole or part and his reasoning about that is <a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">obiter dicta</a>.</p>

<p>The <a href="https://en.wikipedia.org/wiki/Ratio_decidendi" rel="nofollow noreferrer">ratio decidendi</a> – "the point in a case that determines the judgement" or "the principle that the case establishes" – creates binding precedent. The <a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">obiter dicta</a> creates persuasive precedent.</p>

<p>A binding precedent is just that – it binds the decisions of lower ranked courts in the hierarchy. If the facts of the current case match the facts of the precedent then the judge must follow the precedent even if they disagree with it – indeed there are many decisions where the judge expresses their disagreement with the precedent in no uncertain terms. </p>

<p>In addition, there can be conflicting precedent, for example, where the High Court of Australia has made a decision on a piece of legislation that conflicts with a decision of the Supreme Court of NSW on an essentially similar provision in a different Act. A wise judge in such a situation should do what McDougal J did in <a href="http://www.austlii.edu.au/cgi-bin/viewdoc/au/cases/nsw/NSWCA/2010/190.html?context=1;query=security%20of%20payment;mask_path=au/cases/nsw/NSWCA" rel="nofollow noreferrer">Chase Oyster Bar v Hamo Industries [2010] NSWCA 190</a> and issue orders referring it to a court that can overturn one (or both) of the precedents.</p>

<p>A persuasive precedent can influence the decisions of other courts – they are an authority a judge can look to in formulating their reasons but they are free to consider and reject them even if the facts match. <a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">Obiter dicta</a> from same level or higher courts in the hierarchy is persuasive precedent as is <a href="https://en.wikipedia.org/wiki/Ratio_decidendi" rel="nofollow noreferrer">ratio decidendi</a> and <a href="https://en.wikipedia.org/wiki/Obiter_dictum" rel="nofollow noreferrer">obiter dicta</a> from same level courts <em>and</em> courts in other jurisdictions.</p>

<p>Sometimes dissents are issued to call attention to a bad decision in the hope that a higher court or the legislature will address the problem.</p>

<p>Sometimes dissents are issued to clarify what the dissenting judge understands to be the scope of the decision (sometimes arguing that it is narrow, other times arguing that it is broad).</p>

<p>Sometimes dissents are issued to encourage someone to bring a new case that doesn't make the mistakes that caused someone to lose this time around or to help people decide if they should take a legal position by making it easier to predict how individual judges will vote.</p>

<p>Sometimes dissents provide a judge with a way to disavow a decision that the judge thinks is unwise because the judge doesn't want to bear moral responsibility (and reputational responsibility) for a bad decision. Such a judge may also be hoping the other judges not bound by this decision will come to their conclusion (thus shaping the larger law), or that new judges with similar views will be appointed in the future making it possible to adopt the dissenting view eventually as law.</p>

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