You nor anyone else to give a answer to this type of question. We can give personal opions on some lifes questions based on what ever, but nothing can be certain. Nothing i science is considered conclusive or even the truth.
Nothing is written in stone.
Everthing is subject to change, when data or evedence has proved otherwise. If a person thinks that science is error-fre and infallible truth, it's because of the lack of understanding, what the term science is. P Govindarajan, my first instict is to fight you like a dog, but I'm not. Most people do not understand science and reasoning to put things in perspective. Since there are multible aruguments in this document.