---
title: "Discussion on \"The three valued logic\" | Hashnode"
description: "Discussion on \"The three valued logic\". I have been written quite a few migrations and reviewed quite a few of them at Anarock Tech. This is one of the most common mistakes I see developers making, it's simple but quite easy to overlook.\nContext\nCan you spot the issue with this simple migr..."
url: "https://hashnode.com/posts/threevalueproblem/65377d4cbc65df601d32f5cc"
---

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# [The three valued logic](https://www.dsdev.in/threevalueproblem?utm_source=hashnode&utm_medium=feed)

I have been written quite a few migrations and reviewed quite a few of them at Anarock Tech. This is one of the most common mistakes I see developers making, it's simple but quite easy to overlook. Context Can you spot the issue with this simple migr...

Jan 9, 2022 · 2 min read · dsdev.in  
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## Written by

[Dhaval Singh](https://hashnode.com/@DhavalSingh)

@DhavalSingh · Bangalore, India

  
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Writing about Software Development, Backend in particular!

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