Well the thing i don't know what to type......i know, it sounds a bit dumb since i am not that smart. 
i ll make it easy for you,
for example if i want to study "oceanology/history/science/XYZ" when i was 15 i have to go to libraries for the best books in markets and most of the times i come back home with very less data...
now i dnt have to go libraries, i have access to different libraries and
online books what i cant even imagine i can find in my local library backhome...
second step how i know what is best and what should i go for ?
when i was 15 i have to ask from expert like my uncles/professors/teachers/seniors/librarian..
now i dnt have to ask from them i have
online encyclopedia/information with me what tell me what thing is worth reading..
same like you find dr kashif links/ ammar links/ flat earthers link why dnt you find the links from authorised scientists/historians ? by same method.

did you read how i know about the blunder of
kamasutra?
who told me ?
how i find out he is stupid?
is it really hard ?
ok as far i understand u r looking what is the difference between heavy and light water ?
(but i was telling you as a whole) as you requested to find out the mistakes from what that person claim.. by just taking one thing out of many in his articles... u can read my first reply again..
what is the difference between salty and sweet water?
what is the difference between river and sea water? for this information read some books from experts take your time and then after having all information in hand then see what QURAN is saying..
after that go to
how to study QURAN?
difference between what quran is saying
vs what translator is saying..?
STEP by STEP but at this specific case brother mazhar saved you from struggle already...

GOOD luck