> the main argument for project-based learning is ability to make learning interesting
James already addresses this assertion in the very first sentence of the blog post. And the second sentence.
James already addresses this assertion in the very first sentence of the blog post. And the second sentence.
The "main argument" of those posts -- i.e., the posts James is responding to, is not that "project-based learning... make[s] learning interesting".
That may be your main argument, but it's not the argument that the people who James is responding to are (mainly) making.