what sources of information are considered reliable according to the strict standards of scientific investigation?

Peer-reviewed

Explanation:

If a scientific report is peer-reviewed it means that the contents of the report are corroborated by other scientists hence the veracity of the information is high and is very reliable. The best scientific reports clearly describe the experiments that were conducted to culminate to a particular scientific conclusion. The experiment is able to be replicated by another scientist and if the same results are achieved then the results are corroborated and the report positively reviewed.