What is the meaning of truth in mathematical propositions and what is the truth table?

The truth value is the truth value, the actual value that exists objectively under certain conditions. The true value is usually an unknown number. Generally speaking, truth value refers to theoretical truth value, prescribed truth value and relative truth value.

Theoretical truth value is also called absolute truth value, such as the internal angle of a triangle and 180 degrees.

The agreed truth value, also known as the prescribed truth value, is a value close to the truth value, and its difference from the truth value can be ignored. In actual measurement, the average value of the measured values without systematic error for enough times is taken as the agreed true value.

Relative truth value refers to the true value of the next level when the indicated value of the previous level standard is the true value of the next level, which is called relative truth value.

In computer numerical representation, the data form represented by symbol plus absolute value is called "truth value".

The ideal value of the exact number [quantity] value of a quantity or a target under the observed instantaneous conditions. Note: This value can only be obtained when all error causes have been eliminated or the total number of objects is infinite. When the object population is limited, the complete population must be considered.

Extended data

There are usually the following methods to obtain the agreed truth value of a specific quantity:

(1) Reproduce the value given to this specific quantity by the national benchmark or the local highest measurement standard.

(2) adopt the value recommended by the authoritative organization. For example, the latest values of vacuum light speed and Avo Gadro constant recommended by CODATA.

(3) Sometimes, the agreed truth value of a certain quantity is determined by many measurement results.

(4) For hardness equivalence, the values on the agreed reference scale are used as the agreed true values.

Baidu Encyclopedia-Agreed Truth Value

Baidu Encyclopedia-Real Value