Doubt is a particularly dangerous hindrance because it can have a powerful ability to stop us from walking the path towards happiness. The Buddhist approach to doubt is unique in that we do not try to counter doubt with knowledge, which would only lead to a logical debate. Since there can always be many sides to a debate, each seeming equally valid, this cannot lead us out of doubt. In fact, it may create more doubt which, of course, would be counter-productive.
The Buddhist approach to doubt is to adjust our meditation practice so that the doubt itself becomes our object of contemplation. We bring our attention to the various points of view and perspectives that are arising in the mind by noting them and then we let go of them and bring the mind gently back into the present moment. We repeat this process continually until we are able to understand the doubt, where it comes from, and where it will lead us.
If we find that doubt is a dominant feature of our minds, it would be helpful to invest some time looking inside to determine what we truly want out of life so that when the doubt arises, we will have a reference point that we can look to as a compass. Once we have established where we want to go, it will be easier to see whether our own doubts or the doubts of others will lead us there. In that way, if we aim for and walk towards true happiness, it will be difficult for doubt to knock us off course.