 class="mdzsyn-coresym">not=</span> @[<span class="mdzsyn-keyword">:a</span> <span class="mdzsyn-keyword">:b</span>] @[<span class="mdzsyn-keyword">:a</span> <span class="mdzsyn-keyword">:b</span>]))
(<span class="mdzsyn-coresym">assert</span> (<span class="mdzsyn-coresym">not=</span> <span class="mdzsyn-string">@"abc"</span> <span class="mdzsyn-string">@"abc"</span>))

<span class="mdzsyn-comment"># primitive equal will return true if they are same object</span>
(<span class="mdzsyn-coresym">let</span> [<s