That's not how || works. The general pattern is
condition || condition || condition
So, you have to repeat the whole condition each time:
if ($genres[0] eq 'Science Fiction' || $genres[0] eq 'Sci-Fi' || or $g
+enres[0] eq 'Fantasy') {
If you think it is a bit verbose, switch to some other way of checking the values:
# Either
if ($genres[0] =~ /^ (?: Science\ Fiction | Sci-Fi | Fantasy ) $/x) {
# or
if (grep $genres[0] eq $_, 'Science Fiction', 'Sci-Fi', 'Fantasy') {
etc.
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