Actually

I'm pretty sure when the word "actually" is used as a verbal tick (as in "uh", or "um",) it's a sign that the speaker has no clue what they're talking about. Perhaps they use that word to sound like they're knowledgable in the subject, or to kill time for their brain to come up with some other bullshit to spout out next.

Clues like this make conversations easier. For example, if the word "paradigm" is ever used, you're free to let your mind wander until the speaker stops talking... Nothing important ever follows the word paradigm. If you're still reading this, you fail.