"Perception is reality." This quote reminds us that there is always a gap between our perception and others'. And, in design, that matters a great deal. It's helpful to remember. Yet, it's also incomplete. We know that our perception is shaped through the lens of who we are, our past experiences, etc. Hence, my perception is my reality; your perception is your reality; their perception is their reality, etc. 

Think about "sticky notes," what comes to mind?

Giant salvinia. I had no idea what it was, but the “alert” posted on the website of the nearby state park dampened my excitement about renting a weekend cabin. Yet, I decided to follow my own advice and stay curious (that, and I really wanted to get away). So, I read on only to find out that the lake was undergoing a scheduled drawdown so they could remove the giant invader in question (an aquatic fern that had found its way far from its native Brasil). 

Water levels were down on the lake, and giant salvinia was being removed. I booked two nights anyway, but I was wondering how one goes about draining a lake? And, what do they do with the giant salvinia?