What's the difference between 'obscure' and 'vague'?

Question

if I am in discussion and point out others viewpoint to the topic unclear, can I say " your viewpoint is obscure"?

and if I can use that, can I use ' vague ' instead of ' obscure' ?

what's the difference?

and one question more, what's the diffrence between view and viewpoint? I guess view is the area people can see, and viewpoint is the aspect or attitude to topic like that. is that right? if so, am I not supposed to use ' view' instead of ' viewpoint' in that meaning?

Answer 1

Obscure means little known. Vague means unclear.