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3 years ago

What task did the u.s. government undertake that many people identify as the birth of the internet

2 answers:

8 0

The answer is a. the government developed a computer system to be used in military communications. It started in the 1960s and was developed and used to serve as communication without experiencing disturbances from bombs and gain security for military purposes. This was the time when ARPANET (Advanced Research Projects Agency Network) came into the picture. Soon it was opened to people starting from the 70s when emails were used and became more popular. It then paved for further development and largely contributed to technology and communication.

natta225 [31]3 years ago

4 0

Option "a" is the answer. The US government developed a computer system to be used in military operations. They did so by awarding contracts to different science laboratories in 1960. One of the projects they funded was ARPANET, the first internet protocol.

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4 years ago

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3 years ago

Prove whether each argument is valid or invalid. First find the form of the argument by defining predicates and expressing the h

SSSSS [86.1K]

Answer:

The given argument ∀x (S(x) ∧ (M(x) V D(x)) --> ¬ A(x)) ∧ S(Penelope) ∧ A(Penelope) -->¬ D(Penelope) is valid.

Explanation:

Solution:

Let us Consider following predicates:

M(x): x missed the class

D(x): x got a detention

S(x): x is a student in the class

A(x): x got an A

Now,

We Express the hypotheses and conclusion as:

The hypotheses: ∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) and S(Penelope) and A(Penelope)

So,

The Conclusion: D(Penelope)

Thus,

The Argument:

∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) ∧ S(Penelope) ∧ A(Penelope) -->D(Penelope)

Then,

The given argument is valid or correct and prove using the inference rule as follows:

Step Premises Reason (Rule used)

1. ∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) Premise

2. S(Penelope) ∧ (M(Penelope)

V D(Penelope)) --> ¬ A(Penelope) Universal instantiation

3. S(Penelope) Premise

4. A(Penelope) Premise

5. ¬[S(Penelope) ∧ (M(Penelope)

V D(Penelope))] 2,4, Modus Tollens

6. ¬S(Penelope) V (¬M(Penelope)

∧ ¬D(Penelope)) De Morgan law

7.¬M(Penelope) ∧ ¬D(Penelope) 3,6,Disjunctive Syllogism

8¬D(Penelope) 7, Simplification

Therefore, the given argument ∀x (S(x) ∧ (M(x) V D(x)) --> ¬ A(x)) ∧ S(Penelope) ∧ A(Penelope) -->¬ D(Penelope) is valid.

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4 years ago

Read 2 more answers