The bulls finally found their footing Wednesday, prompting the averages to end in the green. But Jim Cramer was still suspicious, wondering if investors just saw a successful re-test of lows, or was it the calm before the next storm? Did investors really have a moment of rationality, or were the sellers just exhausted?

Those were all four reasons why the market could experience an up day, and Cramer was determined to find out which one helped to explain the rebound.