I just forced myself to think of those "ideas" of mine for 90 minutes, though it felt extremely hateful today; before my eye operations I came up with a good idea, but after my eyes were operated, I though it is better not to think too heavily, otherwise my eyes may bulge out of their sockets. Only lately have I forced myself to do that daily "brain work" again.
There is a thread "Ccath's conundrum" at VoA. I am greatly reluctant to think of such problems, because they are useless to me, just those "ideas" on mine may be useful, and I have enough work with them in my old days. But the first paradox seemed easier than the second.