no
Always start the beginning of a sentence with a capital letter.
Yes. 'Thus' is another word for 'therefore'. Thus the sentence you start of with 'thus' should be an explanatory sentence.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
No, why should it be? Well if it's at the start of a sentence, but really, how many sentences start with the word example?
However. On the other hand.
Since 'felon' is a common noun, it is only capitalized if it is at the start of a sentence.
Only if it's the first word in a sentence.
Yes. Every sentence should start with a capitalized word.
A wild person appeared out of the blue. It is a sentence starting with A.
And is a coordinating conjunction; therefore it should never begin a sentence. Ironically, though, the preceding sentence is correct because and is used as a word, not as a conjunction.
can you start a sentence using the word phishing?