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+++
title = "Comparing symbolic evaluations with conditionals"
author = "Yann Herklotz"
tags = []
categories = []
backlinks = ["3c3", "3a7", "2e1c"]
forwardlinks = ["2e1c2", "2e1c1a"]
zettelid = "2e1c1"
+++
``` c
if (P) { x = 1; }
else if (Q) { x = 2; }
else if (R) { x = 3; }
else { x = 4; }
```
is equivalent to the following if $P \land Q$ is *unsatisfiable*:
``` c
if (Q) { x = 2; }
else if (P) { x = 1; }
else if (R) { x = 3; }
else { x = 4; }
```
If $Q \land R$ is *satisfiable*, then these can never change in order,
however, if $P \land R$ is *unsatisfiable*, then it would also be
equivalent to the following:
``` c
if (Q) { x = 2; }
else if (R) { x = 3; }
else if (P) { x = 1; }
else { x = 4; }
```
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