The document discusses different types of knowledge: acquaintance knowledge involves knowing who, ability knowledge involves knowing how to do something, and propositional knowledge involves knowing that something is the case. Propositional knowledge is defined as knowledge that can be expressed through declarative sentences stating that something is true, such as "I know that all swans are white". It is knowledge expressed through indicative propositions.

1. Knowledge

2. All swans are white.
Idris Elba is hench.
All penguins are black and
white.

3. Types of Knowledge
For each, what’s the key question?
• Acquaintance Knowledge = ?
– Knowing…
• Ability Knowledge =?
– Knowing…
– a.k.a. procedural knowledge
• Propositional Knowledge =?
– Knowing…
WHO
HOW
THAT

4. Definition
• “propositional knowledge is the type
of knowledge that is, by its very nature,
expressed in declarative sentences or
indicative propositions” (Wikipedia)
• Propositional knowledge is knowledge that
can be expressed in the form ‘I know that X’,
where X is any proposition of the form A is B.