tok: add knowledge questions/claims

docs/tok.md

@@ -1,3 +1,23 @@
 # Theory of Knowledge
 
+## Knowledge questions and claims
+
+There are two types of knowledge **claims**:
+
+ - First-order claims: claims that are made in areas of knowledge or by individual knowers about the world
+ - Second-order claims: claims that are made about **knowledge** justified using TOK, usually involving an examination of the nature of knowledge
+
+!!! example
+    - The sky is blue. (first-order)
+    - Logic is innate. (second-order)
+
+Knowledge **questions** are questions that examine or engage with knowledge claims, such as by including any of the following phrases:
+
+ - How can we know that…
+ - …knowledge…
+ - How far is it justified…
+
+!!! example
+   Is our knowledge in mathematics more certain than that of science?
+
 ## Resources