How to get 'true' or 'false' for inequality?

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<, >, <= or >=

You don't have to do anything special. The reason for the distinction for equal is you can set something equal to 5 or you can test if something is equal to 5. These are very different. Since you don't set something >= 5, you don't need a separate symbol for testing if something is greater than or equal to 5.