Which is exactly a strawman since you only use your definition for others statements. You refuse to understand the difference thus continue in your strawman. Again look up the null hypothesis and apply this to any other claim, it is valid until falsified. Until the claim has falsified the null, the null still stands. Null is not a positive claim, it is the very first principle of falsification for all claims. This is the difference between strong atheism and weak, a point you refuse to understand. Either you are of incapable of doing so or unwilling to do so.
lecture3
People have put forward a supposedly conceivable god, it is this claim being addressed. You confuse disbelief with rejection of a fact.
Not believing in unicorn can be done via the null position as claims for unicorn's existence has not falsified the default position that unicorns do not exist.
I hate using Youtube but I will so you can get a picture of what I am talking about. Falsification has been the standard for decade in both philosophy and science. Atheism is just not a one off only one reasoning position. You do not seem to understand this. However this is not really my problem but solely on your inability in understand what people are telling you.