I'm not a mathematician, either, but I believe your comment shows why not all infinities are equal. When you attempt to enumerate .1, .2, .3, .4, etc. you get

I'm not a mathematician, either, but I believe your comment shows why not all infinities are equal. When you attempt to enumerate .1, .2, .3, .4, etc. you get an infinite count of numbers. However, when you perform that same operation on .05, .15, .2, .25, and so on, you will get "twice as many numbers" as the first time around. In this way, the second infinite sequence has "twice as many numbers" as the first infinite sequence.