Hey Riley, I've been thinking about limits. {{CMD_7}} That is awesome. {{CMD_8}} I know! You know limits remind me of something{{CMD_9}} How a GPS or a phone computes velocity! {{CMD_10}} Huh. A GPS can calculate our location. Then, to compute velocity from position, it must look at {{MATH_11}} {{CMD_12}} And then we study this as the change in time gets closer and closer to zero. {{CMD_13}} Just like with limits at zero, we can study something by looking {{CMD_14}}near{{CMD_15}} a point, but {{CMD_16}}not exactly at{{CMD_17}} a point. {{CMD_18}} O.M.G.{{CMD_19}}Life's a rich tapestry. {{CMD_20}} Poet, you know it. {{CMD_21}}