# [Japt](https://github.com/ETHproductions/japt), 6 bytes

Outputs `false` for true and `true` for false.

    ü mÊdÍ

[Try it](https://petershaggynoble.github.io/Japt-Interpreter/?v=1.4.6&code=/CBtymTN&input=WzcsMTMsOSwyLDEwLDIsNCwxMCw3LDEzLDQsOV0) or [run all test cases](https://petershaggynoble.github.io/Japt-Interpreter/?v=1.4.6&code=/CBtymTN&input=WwpUcnV0aHk6Cls3LDEzLDksMiwxMCwyLDQsMTAsNywxMyw0LDldClsxLDIsMywxLDIsM10KWzEwLDEwMCwxMDAwLDEsMTAwLDEwLDEwMDAsMV0KWzEyMywxMjNdCls4LDIyLDU3MTg5LDQ5MiwyMiw1NzE4OCw4LDQ5Miw1NzE4OCw1NzE4OSwxLDFdCgpGYWxzZXk6Cls2LDQsNCw2LDQsNyw0LDddClsyLDIsMiwyLDIsMl0KWzUsMSw0LDUsMSwxLDRdCls3NywzMSw1LDMxLDgwLDc3LDUsOCw4XQpbMSwyLDMsMiwxXQpbNDQsNCw0XQpbNTAwLDMwLDFdCl0tbVI)

    ü mÊdÍ     :Implicit input of integer array
    ü          :Group by value
      m        :Map
       Ê       :  Length
        d      :Any truthy (not 0)?
         Í     :  When subtracted from 2