A sentence for invalid?

In: Academic Writing, Example Sentences [Edit categories]

Answer:

The premises on which he based his conclusions were invalid.

First answer by Lynda pruden. Last edit by Lynda pruden. Contributor trust: 23 [recommend contributor ]. Question popularity: 2 [recommend question].

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What is a invalid sentence?
Like telling someone.. "Is an invalid sentence." would be incorrect. "That is an invalid sentence." would be correct.
Invalid in a sentence?
I forgot to renew my licence and now it is invalid.
How do you use the word invalid in a sentence?
The guard could easily identify and invalid ID.
A sentence with the word invalid?
The credit card was invalid; it was not approved at checkout.
How can you use the word invalid in a sentence?
Example sentence - The ticket was invalid because the expiration date had passed.