めいしん迷信meishin
1.
A belief that lacks scientific evidence and often leads to negative consequences in social life, often involving rituals or customs thought to influence fate.
2.
The act of firmly believing in notions that have no objective basis, typically stemming from cultural practices or traditions rather than empirical knowledge.
3.
A misguided conviction where one accepts certain ideas as true without critical evaluation, even when they can be readily recognized as incorrect with available scientific understanding.
Example:
その迷信は彼らの間で今なお残っている。