Tilted or angled to one side rather than straight or level.
From Middle English 'slanten,' possibly from Old Norse 'sletta' meaning to slope. The word originally described a physical tilt and later expanded to describe biased presentation of information.
The word 'slanted' perfectly captures how both architecture and arguments work—physically tilt something just a few degrees and it looks completely different, which is exactly why we use 'slanted' to mean biased information.
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