My reasoning;You say that as if it were a fact.
If you think this ice age cycle would have been completely different from all the preceding ice age cycles, please give us your reasoning.
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A) Not all interglacial periods look alike.
The last interglacial period (Eemian) only lasted 15,000 years. The one before that (Holstein) was much longer, spanning 50,000 years.
Timeline of glaciation - Wikipedia the free encyclopedia
Also, the Holstein was a double-bumper. Actually, you could argue that there were three massive temperature spikes during the Holstein. It all depends on which graph you're looking at because they all differ, leading me to my 2nd line of reasoning...
B) We don't know exactly what occurred before the era of modern instrumentation.