What mindset is represented by someone believing that an event is impossible because it has never occurred before?

The mindset represented by believing that an event is impossible simply because it has never occurred before is best described as inconceivability. This concept implies a limitation in one’s ability to envision possibilities beyond existing experiences or historical precedents. When a person adopts this mindset, they dismiss any potential for change or novelty based solely on past occurrences, thus failing to consider that new possibilities can arise even if they haven't been observed in the past.

Radicalism typically refers to advocating for drastic changes or reforms and doesn't align directly with the disbelief in possibilities. Wishful thinking suggests a belief in what one desires to happen rather than what is realistically probable or impossible. Tabloid thinking often involves accepting sensationalist or exaggerated claims without critical evaluation, which contrasts with the specific restriction of thought represented by inconceivability.