How to check if a view exists

[eluser]dark_lord[/eluser]
Since you guys are discussing regarding views, I think I just want to ask a question cause its this is really making me wonder why? and what is the difference, and when is it or what situation will I use it. Here is the killer question.

What is the difference with true in the view with true is typed capitalize and a true which is type in lowercase.

Code:

$this->load->view('home/blog', $data, TRUE);

VS.

Code:

$this->load->view('home/blog', $data, true);

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Hope you can enlighten me with this. Thanks!