GAME FOR NERDS: THE 2-EXAMPLE CATEGORY CHALLENGE!

1) Ask your opponent to name 2 examples of a category, offering 2 examples as a start.

2) If she/he cannot name 2 additional examples, your category is a winner!

We love to fool ourselves with categories that are actually limited to just two or three representatives, don´t we?

This game principle is very simple, but better understood through examples. That´s why you´ll find a list with more than 30 just below.

Enjoy, and please, contribute in the comments, adding new pseudo-categories.

Easy questions are no fun. So please, keep it impossible (if possible) or at least very hard. Thanks!

Name two transcendental numbers.
Ex: Euler´s number (e constant), Pi (π).
Answer: ________________________.

Name two egg-laying mammals.
Ex: platypus, echidnas.
Answer: ________________________.

Name two metals liquid at room temperature
Ex: mercury, gallium
Answer: ________________________.

Name two categories actually limited to just 2 known representatives.
Ex: oviparous mammals, metals liquid at room temperature.
Answer: ________________________.
  
Name two cyclic biochemical pathways.
Ex: Krebs cycle, Calvin cycle.
Answer: ________________________.

Name two large-scale industrial fermentations.
Ex: bread, wine.
Answer: ________________________.

Name two erosion processes.
Ex: wind erosion, water erosion.
Answer: ________________________.

Name two photosynthetic pigments.
Ex: chlorophyll, xanthophyll.
Answer: ________________________.

Name two international environmental NGOs.
Ex: WWF, Greenpeace.
Answer: ________________________.

Name two types of biochemistry.
Ex: carbon-based, silicon-based (hipothetical).
Answer: ________________________.

Name two types of chemical bonds.
Ex: ionic bonding, covalent bonding.
Answer: ________________________.

Name two types of nuclear reactions.
Ex: fission, fusion.
Answer: ________________________.
  
Name two operating systems.
Ex: Windows, MacOS.
Answer: ________________________.

Name two superhero universes.
Ex: DC, Marvel.
Answer: ________________________.

Name two blind African-American singers.
Ex: Stevie Wonder, Ray Charles.
Answer: ________________________.

Name two Egyptian pyramids.
Example: Chephren, Kheops.
Answer: ________________________.

Name two conquistadors.
Ex: Cortes, Pizarro.
Answer: ________________________.

Name two eating disorders.
Ex: bulimia, anorexia.
Answer: ________________________.

Name two works by Homer.
Ex: Iliad, Odyssey.
Answer: ________________________.

Name two Mesopotamian peoples.
Ex: Babylonians, Sumerians.
Answer: ________________________.

Name two oceanic canals.
Ex: Suez Canal, Panama Canal.
Answer: ________________________.

Name two denominations of Islam.
Ex: Shiism, Sunnism.
Answer: ________________________.

Name two large U.S. political parties.
Ex: Republicans, Democrats.
Answer: ________________________.

Name two Cold War economic ideologies.
Ex: communism, capitalism.
Answer: ________________________.

Name two Spanish painters from the 20th century.
Ex: Picasso, Dali.
Answer: ________________________.

Name two brain cells.
Ex: neurons, glia.
Answer: ________________________.

Name two liquid biofuels.
Ex: ethanol, biodiesel.
Answer: ________________________.

Name two types of DNA.
Ex: mitochondrial DNA, nuclear DNA.
Answer: ________________________.

Name two types of planets.
Ex: gas planets, rocky planets.
Answer: ________________________.

Name two global atmospheric issues.
Ex: ozone depletion, climate change.
Answer: ________________________.

Name two types of twins.
Ex: identical twins, fraternal twins.
Answer: ________________________.
  
Name two musical instruments with a double reed
Ex: bassoon, oboe
Answer: ________________________.

Name two recently extinct birds
Ex: dodo, passenger pigeon
Answer: ________________________.

Name two famous plumbers.
Ex: Mario and Luigi.
Answer: ________________________.



Teddy. September, 2017.