What is Rational and Irrational

what is Rational and Irrational,it is all in point of view , My wife scolding me that I behave Irrational when I spend insane amount of time on My Mobile device , for me it is perfectly rational ,when I am trying out something new to build up my Knowledge .

The Same rational and irrational behavior guide our every day decision making .Like when Britain Introduce the Needles for Junkie whole world said it is irrational behavior , but to me it looks like rational behavior , thinking how much NHS would have paid to treat the Junkies to Aids which will eventually occur by sharing Needles .

Same is case when New Phone like IPhone came into the market with so much delay everyone taught they are irrational in coming with limited set of feature and even no multitasking , but they were rational as they studied how clunky the uX was in existing market , it makes sense to study the competitor , carefully select the points on which you would do the better than existing player and then play the game

so I think we all need to Irrational to be leaders , that takes some courage to take that first step