One bug that I have found is that the Advanced Electronics research does not require the Engine research, while the Science Pack 3 requires the Engine Unit.
Note: This bug is not a bug that would require a log. I have no mods that change technologies installed on this save.

What version is this for? Looking for 0.12 or 0.13 modding documentation, would be helpful to know what version. The most updated I could find was 0.10. Very outdated.