Bull markets — periods in which prices as a group tend to rise — and bear markets — periods of declining prices — can lead investors to make irrational choices. (us.etrade.com)
What I've fought my whole life is the «irrational choice theory» — that people are religious because they don't know any better or they can't help themselves. (religion-online.org)
We have shown that this same mechanism allows the slime mould to balance its nutrient intake, make rational and sometimes irrational choices and trade - off between speed and accuracy requirements. (hfsp.org)