well you are making this movie to a species where water is essential for them. would you not go "hmmmm people will say you need water to live."
the fact that water is essential to life on earth. it's almost like he didn't think it through.


He doesn't even explain why water kills them.

my friend said "water = pure, aliens = impure", so it's pure VS impure.

which is such a freakin' stretch!

Come on guys, it's one to have holes in a plot, but to have one so big, would you not say it affects the writer credibility. Affect how good a movie is?