Oddly Wired
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attention

You fail to notice the obvious in plain sight.

Inattentional blindness occurs when an individual fails to perceive an unexpected stimulus in plain sight because their attentional resources are fully occupied by a concurrent task.

The brain does not 'delete' unattended stimuli; instead, limited cognitive capacity results in the failure to consciously process information that falls outside the current focus of attention.

You do not see the world as it is; you see it as you are focused.

Where this comes from

Study
Simons and Chabris, 1999
What the check found
The definition and source are correct, but the mechanism provided ('deleting') is a popular-science simplification that misrepresents cognitive neuroscience.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.