Can someone please explain what exactly the difference between an intermediate and a transition state is? I understand that they are formed as part of the process in converting the reactants to products in a chemical reaction. Other than that, all I know is that usually a transition state exists...

I came across a question recently in the Chemistry SE. I thought about it a bit and came up with some diagrams, or some other explanation or clarification that could help potential answerers understand exactly what the doubt is. Should I or should I not add these additional elements to that ques...