# A simple question on download

**URL:** <https://forum.depmap.org/t/a-simple-question-on-download/3429>\
**Category:** Q&A\
**Created:** [July 13, 2024, 10:06pm UTC](https://forum.depmap.org/t/a-simple-question-on-download/3429 "2024-07-13T22:06:09Z")\
**Posts on this page:** 1\
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**Author:** ![pmontgom](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.depmap.org/pmontgom/32/4_2.png) [@pmontgom](https://forum.depmap.org/u/pmontgom)\
**Post date:** [July 19, 2024, 1:52pm UTC](https://forum.depmap.org/t/a-simple-question-on-download/3429/2 "2024-07-19T13:52:41Z")

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One thing I’ll point out is that Chronos scores aren’t intended to be used to identify essential genes. Looking at chronos scores \<= 1 will certainly identify essential genes, but it will filter out many other genes which are _likley_ to also be essential.

For identifying essential genes, you likely should be using “Probability of dependency” (such as described in [Where is probability of dependency used? - #2 by pmontgom](https://forum.depmap.org/t/where-is-probability-of-dependency-used/49/2) )

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