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"If you're a social media novice, hashtags - those short links preceded by the pound sign (#) - may seem confusing and unnecessary. But they are integral to the way we communicate online, and it's important to know how to use them"

"Hapkit is an open-hardware haptic device designed to be very low-cost and easy to assemble. Hapkit allows users to input motions and feel programmed forces in one degree of freedom. This enables interactive simulation of virtual environments that represent realistic physics (such as springs and dampers) and creative new touch sensations (like textures and buttons). The Hapkit can be assembled using household tools, costs less than $50 for all components, including the microcontroller board, and is easily set up and programmed by novices."

We take for granted fundamental knowledge or basic steps that the learner has not mastered. Someone who has recently mastered a skill or a body of knowledge, by contrast, remembers more clearly the challenges he faced, and is less likely to skip or skim over basic steps in the learning process.