im searching for the philosophical proof of the next statement (according to my text the source is from frege):(adsbygoogle = window.adsbygoogle || []).push({});

if:

1)propsitons aren't complex singular terms (definite descriptions) and they are domain indicators for definite descriptions.

2)for equivalent singular terms there's the same domain indicator.

3) a singular term doesnt change its indicator. if a singular term is contained in/substituted by another with the same indicator;

then:

4) for all the propsitions with the same truth value there's the same indicator.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Frege proof.

**Physics Forums | Science Articles, Homework Help, Discussion**