All I know is that it's too hot for my lap!
Core based CPUs are designed to operate very reliably at some rather extreme temperatures. If Intel thought your CPU was too hot they'd lower the thermal throttling and thermal shut down points so that your CPU would never get too hot.
On a 65nm laptop, thermal throttling doesn't start to happen until almost 100C and for 45nm mobile CPUs, it is 5C hotter than that. Thermal shutdown doesn't happen until approximately 125C. If Intel thought your CPU was going to turn into a puddle of silicon then they'd obviously lower those temperatures.
As long as your computer is stable and running below the thermal throttling point, core temps are unimportant.
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