"rational individual" is correct and can be used in written English.
Example: In order to make a reasoned decision on the issue, the city council elected a rational individual to mediate.
How could any rational individual pass up those kinds of opportunities?
I'd guess that's it, that the most rational individual doesn't really want to have his beliefs completely confirmed.
But the levels of these fines are generally too low to cause a rational individual to insure.
In a complex story like this, I prefer, as a rational individual, to take decisions as a rational individual, and hear all the arguments one way or the other.
Rational choice theory attempts to explain all social phenomena by reference to the micro level of rational individual activity.
The essence of the metaphor goes to what I just said about rational individual acts scaling up into collectively disastrous outcomes.
Yet evolutionary game theory seeks to describe individuals of limited rationality (commonly known as "boundedly rational" individuals), and the utility theory employed in traditional game theory assumes highly rational individuals.
"Rational individuals came that close to a total destruction of their societies".
Tversky and Kahneman introduced these concepts in 1972, proving that we are not completely rational individuals.
Or were they sometimes rational individuals with clearly defined political goals?
This might work in a world of perfect markets inhabited by perfectly rational individuals with perfect foresight and perfect mobility.
