Definitely mam. If we don't do validation then how should we be assured about the fact that what is written in the literature really goes with the present clinical scenario or not. But can induce high risk of bias. As far as I understand
Yes it is required, our Materia medica contains different variety of symptoms such as Proving, Clinical, Toxicological etc. with different levels of evidence also collected years back, so verification and validation will definitely boost the faith and confidence of young Homeopaths.