There is no coincidence vs It couldn't be a coincidence

Some examples from the web:

• There is no coincidence in the life Suat!
• So, there is no coincidence.
• It would be quite a coincidence, if I was Two, but I am Un-Two, so, there is no coincidence.
• However, there is no obvious coincidence in time between these changes and the deterioration in the financial performance of the Union industry.
• The difference is that there are no coincidences, not when murder's involved.
• In politics, there is no such thing as coincidence.
• This conclusion was contested by several interested parties, which claimed that there is no reasonable and coherent coincidence in time between the injury and the increased imports from the country concerned.
• "there is no such thing as coincidence."
• Father's Landry protest was no coincidence.
• Like you said, no coincidences.
• Doreen's murder was no coincidence.
• It is no coincidence that there is a welter of articles from the other side of the Atlantic - some alarmed, others alarming - but all focusing on the apparently new reality to the United States of economic and monetary union.
• It's no coincidence that we met.
• Your friend's arrival in our hamlet is no coincidence.
• No coincidence a Czech wet work guy is on me after I get burned.
• My meeting with Duparde was no coincidence.
• It is no coincidence that we elkaar meet right now.
• Surely, it was no coincidence.
• Because these things are no coincidence.
• It's no coincidence that they're using primes.

Some examples from the web:

• I knew it couldn't be a coincidence.
• I knew that it couldn't be a coincidence, so I checked.
• Couldn't it be just a coincidence?
• - Couldn't it just be a coincidence?
• Or it could be a coincidence.
• It was weird, yes, but it could be a coincidence.
• It could have been a coincidence.
• It could possibly be a coincidence.
• It could just be a coincidence.
• His death cannot be a coincidence.
• Timeline's too tight to be a coincidence.
• Could be a coincidence, but unlikely.
• Hoffman's murder wasn't a coincidence.
• What a coincidence - sam can help.
• The roommate thing is a coincidence.
• You know, sometimes A coincidence is just a coincidence.
• I mean, it could all just be a coincidence, right?
• It could be just a coincidence, some random werewolf travelling through?
• It could just be a coincidence, all right?
• Now, some people might call that a coincidence, but l don't believe in coincidences.