There are at least four philosophical schools about our ice:
The ice has a strength according to the law of Cause and Effect 1 + 2 = 3. (1)
Snow and ice and distance mean that you do not know the thickness of the ice. (0U1?)
Ice and open water may exist. (1&0)
The spring ice does not last, and you should choose with caution. Attention! (0 = 0,000000000…)