that their conjunction is
    logically equivalent to
    Equation (<a href="#">pit-biconditional-equation</a>).<br />

2.  We can write [causal rule] leading from cause to effect. One obvious causal rule
    is that a pit causes all adjacent squares to be breezy. Write this
    rule in first-order logic, explain why it is incomplete compared to
    Equation (<a href="#">pit-biconditional-equation</a>), and supply
    the missing axiom.<br />
</p>
    </div>
</div>

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<div class="card">
    <