One flag for "knowledge" should be reserved.
School/High school/University can educate students OR produce knowledge OR create instruction papers/building plans from knowledge.
Knowledge can not be traded. Instructions and building plans can be bought at very expensive price.
School recipes:
- education
- 1 knowledge for 40 work
- 1 iron_tools_manufacturing_instructions for 200 knowledge and 200 work
- 1 steel_tools_manufacturing_instructions for 1000 knowledge + 1000 work
- 1 university_construction_plans for 5000 knowledge and 1500 work
- and more
for example:
Smithy production:
- Wooden tools: 1 wood --> 1 wooden tool
- Iron tools: 1 coal + 1 iron + 1 iron_tools_manufacturing_instructions --> 1 iron tool + 1 iron_tools_manufacturing_instructions.
- Steel tools: 1 coal + 1 iron + 1 steel_tools_manufacturing_instructions --> 1 steel tool + 1 steel_tools_manufacturing_instructions.
So blacksmith do not need new instructions for every thing he produce.
University building cost: materials and university_construction_plans.
University can employ more people and produce cheaper knowledge and powerful plans and instructions:
- education
- 1 knowledge for 10 work
- steel_fatory_construction_plans for 10000 knowledge
- GMO seeds for 1000000 knowledge :)
Steel factory can produce cheaper tools and other things:
- Iron tools: 1 coal + 1 iron + 1 iron_tools_manufacturing_instructions --> 4 iron tool + 1 iron_tools_manufacturing_instructions.
- Steel tools: 1 coal + 1 iron + 1 steel_tools_manufacturing_instructions --> 4 steel tool + 1 steel_tools_manufacturing_instructions.
- some materials + elevator_manufacturing_instructions --> elevator, allowing higher houses.