Flow : comparison syntax with data stored in memory

I’m in trouble with this:

1. I load user preferences in a keyed array
   
   

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2. it works well, i can retrieve them in the browser
   
   

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3. And in a flow i want to test the values, but my IF statements does not work
   
   

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4. What is the rigth syntax ? I must confess that i’m not confident with when to use curly brakets {{}} and when not to use them.