What is the point of clog?

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Is it possible to redirect clog, cerr, cout, stdin, stdout, and/or stderr?

Yes. You want the rdbuf function.

ofstream ofs("logfile");
cout.rdbuf(ofs.rdbuf());
cout << "Goes to file." << endl;

Is the only difference between clog and cerr the buffering?

As far as I know, yes.

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