Compare and contrast:
First of all we have this:
It is certain, and evident to our senses, that in the world some things are in motion [motion here means to change from one state to another].
And secondly we have this:
Thomas' Argument from Efficient Cause begins with the empirical observation of causal sequence in the world. Hence, this argument is an à posteriori argument, and the conclusion is not claimed to follow with certainty.
The Argument from Efficient Cause: There is an efficient cause for everything; nothing can be the efficient cause of itself.
Clearly nobody has told this lecturer (and unfortuantely his students wouldn't have learn't it either) that the words some things and everything don't have the same meaning.
[I shouldn't say that isn't the only issue with that page. I noticed about 33 elementary mistakes and misunderstandings. I can't claim to have seen them all.]
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