Science answers testable questions, some questions are not testable.
We do not know for certain what questions cannot ever be answered by science; we can certainly say which questions have not yet been answered by science, but we do not know what new information may be obtained by scientific research in the future. However, some types of problems do seem to be more amenable to scientific enquiry than others. Science has a particular method, based on observation and logical analysis. This is an excellent method for many types of problems, but perhaps not for all types of problems. Some things may depend more on feelings than on logical analysis.
You can find a suitable resource for questions about medical science on sciencebasedmedicine.org/nine-questions-nine-answers/
Generally speaking, as a safe answer, it is because of the scientific method. This method requires you to construct a hypothesis, test this hypothesis by experiment and data to reach a conclusion that can be tested (to the same results) by others. For example: this method can prove that gravity is constant field without reliance on mass - but it cannot be explained how this field reacts to other fields (unified field theory). This method also requires that there is an answer. Some questions such as what is the best beer, prettiest woman, true love, true religion etc. are more opinion than fact with no "right" answer.
Because some of life's questions are too deep and complicated for science to answer.
Science questions are science questions.
Yes. I have personally answered 33,672 questions and there are others on here who have answered more. Some questions don't deserve an answer. Others are rude or not complete questions.
people are crazy
Some questions are not real questions, others don't have an answer.
Some questions that science can't answer include questions about subjective experiences (e.g., the nature of consciousness), questions about morality and ethics (e.g., what is right or wrong), questions about purpose and meaning in life, and questions about the existence of God or supernatural phenomena. These are philosophical or metaphysical questions that fall outside the scope of scientific inquiry.
Questions are answered. Some take longer than others.
Because some questions are unintelligible, others are ambiguous. In addition some questions do not have a 'straight' answer.
one of the advantage of learning science is through science we can answer some unanswered questions that confuse our minds involving the community.One of its disadvantage is that science could be a heresy to Christianity in some aspects of beliefs.