# Right-BI[C]EP: Cross-Checking Using Other Means

Learn about the use of other means to cross-check the tests.

## We'll cover the following

Any interesting problem has many solutions. We will choose our preferred solution based on any number of reasons. That leaves the other solutions open for cross-checking the production results.

Even if the alternate solutions are too slow or inflexible for production use, they can help cross-check our preferred solution.

## Implementation of the square root

We can use the Java library implementation of square root to cross-check. We check whether or not our new spiffy square-root logic produces the same results as `Math.sqrt()`

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