16 short cards. Read one, answer one question — wrong answers just explain, nobody fails. Then try it for real: a sponge that never gets squeezed goes mouldy.
0/16 SOAKED · 0 SPONGE POINTS
Sponge points measure what you know, not what you've done — they don't change your rank.
Seen enough?
You don't need all 16. The best next step is a real one.