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Product Designer at Shopify
I make things @Shopify
This totally depends on context. We should always balance quantitative and qualitative research (data + talking to real humans) when we make decisions.
Is it because of a personal subjective opinion or assumption?
Can you clearly articulate why going with this data is the wrong approach?
Can you demonstrate the value of the thing you're pushing for?
Sometimes we pick the wrong things to measure, which can lead to a shitty experience for the people using your design.