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Joel Greek4,421 Points
Why is ernies age-property a string?
Is there a reason ernies age-property is a String (surrounded by '') but none of the others?
Steven Parker216,863 Points
I'd bet that was unintentional, and it may have slipped by because nothing in the demo program does anything with the age attribute where the type matters.
Normally, you'd want all objects to use the same type for a specific attribute.
You might want to submit this as a bug to the Support team. It could get you an "Exterminator" badge!