12 ideas
| 13157 | Choose the true hypothesis, which is the most intelligible one [Leibniz] |
| 7548 | Classes, grouped by a convenient property, are logical constructions [Russell] |
| 7545 | Visible things are physical and external, but only exist when viewed [Russell] |
| 7553 | Sense-data are purely physical [Russell] |
| 7549 | If my body literally lost its mind, the object seen when I see a flash would still exist [Russell] |
| 22200 | If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle] |
| 13158 | The Copernican theory is right because it is the only one offering a good explanation [Leibniz] |
| 7546 | A man is a succession of momentary men, bound by continuity and causation [Russell] |
| 7550 | We could probably, in principle, infer minds from brains, and brains from minds [Russell] |
| 7547 | Matter requires a division into time-corpuscles as well as space-corpuscles [Russell] |
| 7551 | Matter is a logical construction [Russell] |
| 7552 | Six dimensions are needed for a particular, three within its own space, and three to locate that space [Russell] |