    Sentence: 1: ‘It’ has ‘been: suggested  that..SF include: only ‘those. ‘stories  which’ .. wwould*: ‘be "* invalidated  without .: their. scientific ‘content;  that. fittion.. : whieh ... concerns  sciénceé,” scientists, and the impact  of -sclénice“on, humans; that which.  explores alternate ~: . -existences  cw} ether », fature; extraterrestrial,  onily:::. in... “characters’ minds)  based on’ ..facts: and . “logical  progression: via, scientific method.    Sentence % ‘Many.: Sciencé: Fiction’  ‘stories: aré. wholly: unscientific, and.  should: “instead ..bé". categorized..as  Fantasy. :