y is also a correlating pathway because if an individual ant can travel from X to Y, then ants from the same colony can be sighted at both X and Y.</p>
<p>There is another kind of pathway: the <strong>non-correlating pathway</strong>. With a non-correlating pathway between X and Y, there is no way for ants from the colony to show up at both X and Y. For example</p>
<p><span class="math display">\[\text{Non-correlating pathway: }\ Y \rightarrow C \leftarrow X\]</span> Try it out. Is there any single node whe