can you start a sentence with whereas

can you start a sentence with whereas

Most authorities and manuals such as the Chicago Manual of Style make it clear.
Can you start a sentence with ‘whereas’?

There is nothing wrong with starting sentences with “and,” “but,” or other similar conjunctions. You may, however, encounter people who mistakenly believe that starting a sentence with a conjunction is an error, so consider your audience when deciding to structure your sentences this way.
Separating these sentences with a period is a dramatic way to emphasize the contrast introduced by but. Not everyone, likes this style, though. It’s also possible to connect these sentences with a comma:

Can you start a sentence with whereas
You should use a comma to introduce a dependent clause that starts with an adverb of concession.
The general rule for subordinating conjunctions states that you shouldn’t use a comma before a subordinating conjunction that comes after the main clause. However, “whereas” and “although” are examples of adverbs of concession, along with “though” and “even though”. They are used where a dependent clause is contrasting to the main clause (a bit like “but”).

Can you start a sentence with whereas
14th century, in the meaning defined at sense 1a
These example sentences are selected automatically from various online news sources to reflect current usage of the word ‘whereas.’ Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

For whereas three candidates were in nomination, the ballots were forming but two piles.
But whereas she knew that Vere was doing so, Vere could not know that she was.

References:

http://www.grammarly.com/blog/starting-a-sentence-with-a-conjunction/
http://prowritingaid.com/grammar/1008098/Should-you-use-a-comma-before-whereas-and-although-
http://www.merriam-webster.com/dictionary/whereas
http://www.thesaurus.com/browse/whereas
http://www.thesaurus.com/browse/in%20conclusion