/* * Patch for filter_var() */ if(!function_exists('filter_var')){ define('FILTER_VALIDATE_IP', 'ip'); define('FILTER_FLAG_IPV4', 'ipv4'); define('FILTER_FLAG_IPV6', 'ipv6'); define('FILTER_VALIDATE_EMAIL', 'email'); define('FILTER_FLAG_EMAIL_UNICODE', 'unicode'); function filter_var($variable, $filter, $option = false){ if($filter == 'ip'){ if($option == 'ipv4'){ if(preg_match("/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } if($option == 'ipv6'){ if(preg_match("/\s*(([:.]{0,7}[0-9a-fA-F]{0,4}){1,8})\s*/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } } if($filter == 'email'){ if($option == 'unicode' || $option == false){ if(preg_match("/\s*(\S*@\S*\.\S*)\s*/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } } } }
https://www.quora.com/ (https://www.quora.com/)
Scientific theories are formulated to explain known phenomena. When creationists say “evolution is only a theory” they are either A: agreeing that evolution occurs, because otherwise there could be no theory to explain it, B: lying, by pretending there is no difference between what the word “theory” means colloquially versus what it means in science, or C: demonstrating their ignorance of this distinction.
We have a theory of evolution to explain the evolution we know occurs in the world. We do not have a theory of unicorn flight dynamics because there is no evidence for flying unicorns.
The fact that evolution occurs had been recognized long before Darwin. Darwin merely hypothesized that natural selection was the mechanism behind it. What we would now call Darwin’s hypothesis of natural selection was “only a theory” in the colloquial sense of something postulated as possibly true, but it has now been so well confirmed by multiple different lines of evidence from different fields that the only possible way if could be overturned is to demonstrate that we all live in The Matrix and all of reality is a sham.
At this point, it is only possible for scientific developments to refine our understanding of how evolution takes place and under what circumstances different forms of natural selection operate. Not only is evolution real, it’s arguably the best understood process in all of nature. It’s far more likely that new developments will disprove gravity, dark matter, or the perceived limit to the speed of light than that it will disprove evolution.