Tech tree dependancy logic

[ceauke]

Hi guys

This may have been asked before, but I couldn't find it in the search.

I realised that when unlocking science, if there are multiple lines leading into an unlocked boxed, that any one of them will allow you to unlock the science.

Normally in tech tree games, you have an AND condition between all the prerequisites, but for KSP it seems that it works easier by having an OR condition for the various prerequisites.

Am I right? Is this intentional?

Edited August 24, 2014 by ceauke

[Rhomphaia]

Most are OR but a couple of the nodes have an AND condition.

[UmbralRaptor]

Most are OR but a couple of the nodes have an AND condition.

This. The exact AND nodes have changed over time, and as of 0.24.2, the only AND nodes are for ion and nuclear engines.

[Mr Shifty]

The Better Than Starting Manned mod makes all of the nodes into AND conditions.