Question
Explain the form for the statement and its substitution.

Answer

Logic examines the validity of an argument. There are metaphorical rules in logic to check authenticity. To understand these metaphorical rules, it is necessary to understand two things:
$1.$ The form for the statement and $2.$ The substitution of the form for the statement.
$1.$ Form for statement: Form for statement is a sequence of symbols that have statistical variables and their
If different statements are put in place, one result is obtained. E.g. $T.\ p\ \rightarrow \ q, p\ \&\ q, p$ etc. are forms for the statement.
  • A statement can be arranged in the form of a form, whether it is true or false. A statement obtained in this way is true or false.
$2.$ Repositioning of the form for the statement: Repositioning of the form for the statement is a statement obtained from any form for the statement.
  • Since any statement can be substituted for legislative variables, there are a number of substitutions for any one form of statement.
All of the following statements $p\ \&\ q$ are substitutes for the same form:
Representation The statement symbol
$1.$ The Ganges is sacred and the Himalayas are scenic. $G\ \&\ H$
$2$. Meera is a devotee of Krishna and Radha is a lover of Krishna. $M\ \&\ R$
  • Thus, replacing any legislative variation in any form for a statement gives a substitution of the form for the statement.
  • A simple, composite or complex compound statement can be substituted for the legislative variation that occurs in that form when obtaining a substitution for any form; But the logical factors that come in the form of a statement cannot be changed. That is why these factors are called logical constant.
Simple, composite and complex compound substitutions for a statement:
$1.$ Simple form for statement: Simple substitutions for statements:
$p\ 1. N$
$2.\ D\ \&\ N$
$3.\ V\ \rightarrow\ G$
$2.$ Compound form for disruption: Simple substitutions for statements:
$p\ \&\ q\ 1.\ D\ \&\ N$
$2.\ (R\ \rightarrow\ N)\ \&\ G$
$3.\ (D\ \leftrightarrow\ V)\ \&\ (R\ v\ N)$
$3.$ Complex compound form for statement: Complex compound substitutions for statement:
$(p\ \&\ q)\ v\ r\ 1.\ (N\ \&\ G)\ v\ R$
$2.\ [(A\ v\ B)\ \&\ (M\ \rightarrow\  N)]\ v\ ( R\ \rightarrow\ S)$
$3.\ [( R\ \leftrightarrow\ S)\ \&\ F)\ v\ L$​​​​​​​
  • Considering the above substitutions of forms for a simple, composite and complex joint statement, it can be said that there can be many substitutions for any one form of a statement.
  • There are many substitutions for any one form of statement. Not only that, but a single statement can also be a substitution of more than one form for a statement.
  • Form for statement Replacement of the form for the statement
$1.\ p\ 1.\ R\ v\ S$
$2.\ p\ v\ q\ 2.\ R \ v\ S$
  • Thus, a single statement can be a substitution of more than one form for a statement and a substitution of any one form for a statement can be many.

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