When a singular
explanation is being used to answer a wide range of questions for the primary reason that said explanation is enough vague, general or "above logic" to fit in almost every situation and for any purpose.
With the use of Gasterism one can "solve" a difficult problem by employing a solution that in itself still requires a deeper explanation, effectively removing their
responsibility of giving real concrete answers.
Although Gasterism gets criticized for laziness, avoidance and uncreativeness, it is easily missable due to its way of presenting a cause that at first glance explains
everything with no issues.
Guy 1: "Hey dude, how do birds fly?"
Guy 2: "Idk, physics"
Guy 1: "Well, how was the sun formed?"
Guy 2: "Idk, physics"
(Gasterism in action)
Guy 1: "Wait, if the fire spell is powerful enough to completely burn all those henchmen, then why did it only slightly hurt the main villain?"
Guy 2: "It's magic, don't
think about it too much"
(Magic = Gasterism)
Guy 1: "Last night I heard a sound from
the chicken. When I went to check, apparently one of the dishes fell out of the dishwasher for no reason!"
Guy 2: "Must've been a ghost"
Guy 1: "Yeah, there is no other
explanation"
(Gasterism: Easy to use, hard to explain)