Can I change a noun to another?

Is there any term we use to describe another noun?

Why are pigeons birds?

Why does “x is y” give a syntax?

Can the’moments’ that describe the concept be called as any other word?

This makes me think of an apposite Noun, but I don’t believe this counts as that?

What do you think about the new wave in U.S. political science?

Asked on March 20, 2021 in Grammar.
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5 Answer(s)

Where and how are these statements and their logic based and what is the terminology?

Karl Marx is a teacher

This is a singular membership proposition : a proposition asserting that an individual (in this case Karl) is member of a category (teachers)


Pigeons are birds. They work in a comma. They are part of a group of species the same bird.

Also,

all pigeons are birds.

This is an A-form categorical proposition : a proposition asserting that all of the members of one category, the subject term (pigeons), are included in another class, the predicate term (birds).

In logic, a predicate in this example is the function “is a bird”, which takes an individual as an argument (the subject), and outputs “true”, or “false”. I interpreted this as the logic for a normal logical logic.

There are 4 standard forms of categorical propositions:

  • A-form -All are P in mathematics.
  • E-form : No S are P.
  • I-form is the system when many S are P. Some form are the system can be N.
  • Some S are not P. In some forms, O = form H is P. In C, some form or M is O.

Quantity : A-form and E-form categorical propositions are universal, I-form and O-form categorical propositions are particular (or existential ).

Query quality : A-form and I-form categorical propositions are affirmative, E-form and O-form categorical propositions are negative.


Karl Schroff is a teacher.

Pigeons are birds.

What is a predicative on the grammar used in a sentences consist of a subject (“Karl”, “Pigeons”), a copula (“are”, “is”) and predicative complement (“a teacher”, “birds”).

Can a subject and a predicative complement be much longer than just a noun? A predicative complement can be any adjective word.

Answered on March 21, 2021.
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Where and how are these statements and their logic based and what is the terminology?

Karl Marx is a teacher

This is a singular membership proposition : a proposition asserting that an individual (in this case Karl) is member of a category (teachers)


Pigeons are birds. They work in a comma. They are part of a group of species the same bird.

Also,

all pigeons are birds.

This is an A-form categorical proposition : a proposition asserting that all of the members of one category, the subject term (pigeons), are included in another class, the predicate term (birds).

In logic, a predicate in this example is the function “is a bird”, which takes an individual as an argument (the subject), and outputs “true”, or “false”. I interpreted this as the logic for a normal logical logic.

There are 4 standard forms of categorical propositions:

  • A-form -All are P in mathematics.
  • E-form : No S are P.
  • I-form is the system when many S are P. Some form are the system can be N.
  • Some S are not P. In some forms, O = form H is P. In C, some form or M is O.

Quantity : A-form and E-form categorical propositions are universal, I-form and O-form categorical propositions are particular (or existential ).

Query quality : A-form and I-form categorical propositions are affirmative, E-form and O-form categorical propositions are negative.


Karl Schroff is a teacher.

Pigeons are birds.

What is a predicative on the grammar used in a sentences consist of a subject (“Karl”, “Pigeons”), a copula (“are”, “is”) and predicative complement (“a teacher”, “birds”).

Can a subject and a predicative complement be much longer than just a noun? A predicative complement can be any adjective word.

Answered on March 21, 2021.
Add Comment

Where and how are these statements and their logic based and what is the terminology?

Karl Marx is a teacher

This is a singular membership proposition : a proposition asserting that an individual (in this case Karl) is member of a category (teachers)


Pigeons are birds. They work in a comma. They are part of a group of species the same bird.

Also,

all pigeons are birds.

This is an A-form categorical proposition : a proposition asserting that all of the members of one category, the subject term (pigeons), are included in another class, the predicate term (birds).

In logic, a predicate in this example is the function “is a bird”, which takes an individual as an argument (the subject), and outputs “true”, or “false”. I interpreted this as the logic for a normal logical logic.

There are 4 standard forms of categorical propositions:

  • A-form -All are P in mathematics.
  • E-form : No S are P.
  • I-form is the system when many S are P. Some form are the system can be N.
  • Some S are not P. In some forms, O = form H is P. In C, some form or M is O.

Quantity : A-form and E-form categorical propositions are universal, I-form and O-form categorical propositions are particular (or existential ).

Query quality : A-form and I-form categorical propositions are affirmative, E-form and O-form categorical propositions are negative.


Karl Schroff is a teacher.

Pigeons are birds.

What is a predicative on the grammar used in a sentences consist of a subject (“Karl”, “Pigeons”), a copula (“are”, “is”) and predicative complement (“a teacher”, “birds”).

Can a subject and a predicative complement be much longer than just a noun? A predicative complement can be any adjective word.

Answered on March 21, 2021.
Add Comment

Where and how are these statements and their logic based and what is the terminology?

Karl Marx is a teacher

This is a singular membership proposition : a proposition asserting that an individual (in this case Karl) is member of a category (teachers)


Pigeons are birds. They work in a comma. They are part of a group of species the same bird.

Also,

all pigeons are birds.

This is an A-form categorical proposition : a proposition asserting that all of the members of one category, the subject term (pigeons), are included in another class, the predicate term (birds).

In logic, a predicate in this example is the function “is a bird”, which takes an individual as an argument (the subject), and outputs “true”, or “false”. I interpreted this as the logic for a normal logical logic.

There are 4 standard forms of categorical propositions:

  • A-form -All are P in mathematics.
  • E-form : No S are P.
  • I-form is the system when many S are P. Some form are the system can be N.
  • Some S are not P. In some forms, O = form H is P. In C, some form or M is O.

Quantity : A-form and E-form categorical propositions are universal, I-form and O-form categorical propositions are particular (or existential ).

Query quality : A-form and I-form categorical propositions are affirmative, E-form and O-form categorical propositions are negative.


Karl Schroff is a teacher.

Pigeons are birds.

What is a predicative on the grammar used in a sentences consist of a subject (“Karl”, “Pigeons”), a copula (“are”, “is”) and predicative complement (“a teacher”, “birds”).

Can a subject and a predicative complement be much longer than just a noun? A predicative complement can be any adjective word.

Answered on March 22, 2021.
Add Comment

Where and how are these statements and their logic based and what is the terminology?

Karl Marx is a teacher

This is a singular membership proposition : a proposition asserting that an individual (in this case Karl) is member of a category (teachers)


Pigeons are birds. They work in a comma. They are part of a group of species the same bird.

Also,

all pigeons are birds.

This is an A-form categorical proposition : a proposition asserting that all of the members of one category, the subject term (pigeons), are included in another class, the predicate term (birds).

In logic, a predicate in this example is the function “is a bird”, which takes an individual as an argument (the subject), and outputs “true”, or “false”. I interpreted this as the logic for a normal logical logic.

There are 4 standard forms of categorical propositions:

  • A-form -All are P in mathematics.
  • E-form : No S are P.
  • I-form is the system when many S are P. Some form are the system can be N.
  • Some S are not P. In some forms, O = form H is P. In C, some form or M is O.

Quantity : A-form and E-form categorical propositions are universal, I-form and O-form categorical propositions are particular (or existential ).

Query quality : A-form and I-form categorical propositions are affirmative, E-form and O-form categorical propositions are negative.


Karl Schroff is a teacher.

Pigeons are birds.

What is a predicative on the grammar used in a sentences consist of a subject (“Karl”, “Pigeons”), a copula (“are”, “is”) and predicative complement (“a teacher”, “birds”).

Can a subject and a predicative complement be much longer than just a noun? A predicative complement can be any adjective word.

Answered on March 22, 2021.
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