Like it or not, ED does not have a good track record of providing player with any information. To prove a point: Aquire 5 Pharmaceutical Isolators using only in-game knowledge. Then, unlock Guardian FSD booster using only information available within the game.
Agreed that ED doesn't have a great record overall - but it has been getting better at it in the last year or so.
Pharma Isolators should be fairly easy to work out in-game nowadays:
- Pilot's Manual has enough information about signal sources to hint that you need to look at High Grade
- the description of the material (e.g. through an engineer blueprint) tells you that you need to look for Outbreak and signal sources
- map can be filtered for Outbreaks
... or
- deduce existence of material trader from map filters
- visit trader (manufactured are relatively easily to stumble across, so by the time you actually need PIs you should have found some)
- for only 5 PIs, cross-trading something else is viable
Guardian FSD Booster is still tough, but obviously the people who figured it out the first time did it with only in-game information, and less than is currently available:
- discover existence of module from Guardian Tech Broker
- note connection of Ram Tah to Guardian research (Codex or Galnet)
- visit Ram Tah, get missions to investigate Guardian sites
- use Codex to get some site locations, and then map filter for Guardian to find some more
Then there's quite a lot of trial and error needed at the sites to figure out how they work - but still, much easier than it used to be. And "trying things in game and seeing if they work" is absolutely in-game available information.
I think the key is that there are a lot of grey areas:
1 - this information is not available in-game
2 - this information is available in-game, but in practice you can't reasonably determine how to find that information
3 - this information is available in-game, and there's a reasonable way to find that out based on following clues, or investigating things you can find
4 - this information is easily available in-game if you look for it
5 - this information is prominently shoved at you even if you don't look for it.
Something like the Farseer meta-alloy requirement started out as '2' and has probably moved to '3' by now - but as a starter engineer requirement should probably be closer to '4'. Conversely, something like Bill Turner's Bromellite requirement is at '3' and as an advanced engineer can safely stay there.
Very little is actually at '1' - but anything at '2' might as well be, and so that level should be saved for things which are intended to actually be mysteries or collaboratively solved. So it was fine for the Guardian FSD Booster to start out at '2' when it was first introduced ... it's drifting towards '3' now but isn't there yet.
The problem is that some people complain information isn't "in game" when they mean it isn't at '5' - I've seen "not in game" complaints about '4's. Some people want to be able to outsource thinking about stuff - which is fine, but probably not the direction the game is really going.