Analytic philosophy
Ideal language

Additionally, Russell adopted Frege's predicate logic as his primary philosophical method, a method Russell thought could expose the underlying structure of philosophical problems. Logical form would be made clear by syntax. For example, the English word "is" has three distinct meanings, which predicate logic can express as follows:

From about 1910 to 1930, analytic philosophers like Frege, Russell, Moore, and Russell's student Ludwig Wittgenstein emphasized creating an ideal language for philosophical analysis, which would be free from the ambiguities of ordinary language that, in their opinion, often made philosophy invalid. During this phase, they sought to understand language (and hence philosophical problems) by using logic to formalize how philosophical statements are made.
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