The human mind uses abstractions, which allow us to complete the picture, even if the data is incomplete.

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It relies on data supplied by states, but the data is often incomplete and inadequate.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

But in reality, the data people share on Facebook is flawed and incomplete.

CNN: Review: Facebook's Graph Search is not very useful

The first-quarter figure is an initial estimate based on incomplete data and will be revised either up or down in the coming months.

BBC: US economy grows by 3.2% in first quarter