Kantian ethics 重要性大家都聽到悶唔講,但佢對於人既認知都有獨特既睇法。非常簡單咁講,就係佢認為人唔可以完全冇sensory input 只係得個理性去思考。就係個句文青金句 thoughts without content are empty, intuitions without concepts are blind. 點解個個人都講kant就係呢條德國粉腸寫野太難明,間唔中又有人彈出黎話譯本譯得唔好,死左二百年仲攪到人陀陀轉。
你其後讀既哲學書會或者成日見到 concept, intuition, scheme, sense data, representational content....
但係仍然有technical嘅嘢,學少少就可以
開頭嘅Russell Paradox(X = {x : x does not belong to X},現今嘅數學家係要求做specification嘅時候都要belong to 原本未specify嘅set去eliminate呢個問題,但Russel用type theory),明少少set-theoretic會易啲,但佢有俾example
Witt用N()代表無限version嘅Sheffer stroke,所以你要明少少經典邏輯nor點用
Alonzo Church shows a given formula in first order logic cannot be decided as tautology by a decision procedure ,呢個result你聽完知道Wittgenstein講嘅嘢只係適用喺proposition logic就可以