Quote Originally Posted by Jarno View Post
From my perspective (perceiver), I tend to see them that way. If somebody calls me to go to a party, I stand up and go. But judgers can't do this, they need to know it in advance, so they can prepare for it. They are also easely stressed and can't change their mind quickly.
That doesn't not describe Socionics j/p. Also, if that were true, the Duality between Rationals would have been implausible.

That "catch the train else you'll be left behind" is more of an Ethical Rational attitude than an Irrational. In fact I don't know what made you conclude that such readiness can be an Irrational quality...