I...erm...well...that is...kind of...[distracting thought about something said five minutes ago]...umm...what's the word?...hmmm...[ooh, what's that strange noise]...it's like...as if...[quick, think! what are we talking about again]...er...I...um...[racks brain for generic acceptable response]...what it is...erm...I think...um... Yes!
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When you are fighting an invisible monster, first throw a bucket of paint over it.