Wittgenstein states that the picture of a proposition is a logical one. By this, he means the possible description of reality. The reality of a proposition is explained through two ways.

1. By explaining its sense.
2. By determining its truth condition.

Sense reflects the picture in a proposition. A proposition will be true if the sense of that proposition agrees with reality and it will be false if it does not agree with the reality. Thus, "a proposition is a picture of reality" (Tractatus, 4.12). This will enable us to bring out the truth condition of a proposition. He further states that every proposition can be judged as either true or false because all propositions are endowed with 'thought' and a thought is about the state of affairs of the world. Thus, he confirms that we cannot imagine a sentence without its truth condition.

But in his later work (Philosophical Investigations), Wiigenstein mentioned some of the shortcomings of the 'picture theory of meaning', as it does not support to determine the meanings of all sorts of sentences. He thus has offered an alternative theory known as 'use theory'. It expresses that meaning is immanent, but not transcendent. Further, he evinced that determination of meaning of a sentence should not rely on the truth condition of that sentence. We can obtain the meaning of a sentence even though we don't know its referent(s). Thus, for later Wittgenstein, we should not worry about the truth condition of a sentence, rather we should focus our attention on the use of a sentence, i.e., how a sentence is used in the context of a language.