What makes someone a Michigander is different for everyone, but if these things are true for you there's no doubt of your heritage. 

1.You call it "Pop".

Emily Wing Photography 

You know exactly what flavors like Red Pop and Rock n’ Rye taste like, and you’d never dream of calling them “Soda”.

2.You went on a school field trip here:

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And Here:

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We all thought the exhibits were cool, but a trip to the gift shop for flattened pennies, rock candy, and giant jaw breakers was a must.

3. Your mother swore this would “settle your stomach”.

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No sick day home from school was complete without Vernors ginger ale.

4. You know what a pasty is.

A trip over the Mackinac bridge requires a stop for these classic meat pies.

5. You know how to pronounce "Tahquamenon" and "Mackinac".

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And you’ve been to both on a trip to see “the colors”.

6. You find this acceptable when the temperature is over 40 degrees:

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Alright, so you might not find shorts in the snow acceptable, but you still expect to see it on those melty March days.

7. You buy your groceries from "Kroger's" and your car from "Ford's".

source: https://nyti.ms/2qxDphZ

There’s no telling why Michiganders make these nouns possessive, but you know you're a Michigan native if you do.