Questions:
1) Step C: Why does searching on the keyword ‘Jesus’ automatically create a relationship (correlation) to the number of Christians in the world?
2) Step C: I may search ‘Jesus’ and I’m not a Christian - How am I factored in?
3) Step C: More specifically, I presume many Non-Christians have used the keyword search of “Jesus”. How are they discerned and accounted for?
4) Step E: Why are you multiplying the ratio with the number of keyword searches for ‘Flat earth’? What's the reason for multiplying?
5) Lastly, what does religion have to do with this?
Ignoring the compounding factors the idea is quite simple (also it is results not searches):
For any given idea/belief there will be some number of people that believe and some number that don't.
These people will make pages discussing the belief.
The number of results will magically be proportional to the number of people that believe, either because the number of people that don't believe do not significantly contribute to the search results, or the more people that believe, the more people will post things promoting it and opposing it.
As such, there should (in this fantasy world) be some factor k which when multiplied by the number of believers gives the number of search results.
i.e. R=k*B
You can also rearrange that to get B=R/k, or k=R/B.
He then uses a single point to calibrate this (e.g. Jebus).
So 2.2 billion believers 0.89 billion results, so k=0.89/2.2=~0.405.
He then uses this for FE to calculate the number of believers:
B=R/k=9.33 million/0.405=~23 million believers.
So that can address questions 2 to 4, assuming 1 has a sufficient answer.
As for 5, that is just a simple thing to find out how many people believe (at least to a very rough approximation).
The big issue is question 1 - Why is there a correlation in the first place?
There are things which no one believes, like Harry Potter, with loads of results. There are things which basically everyone believes, with very few results.
And the other big issue is why would belief be the only correlation?
Unfortunately for Inky, he has no rational responses to these questions. He just asserts the correlation is as he claims, that he has magically proven it, and moves on.
As some more examples, assuming this nonsense actually worked, lets try something simple:
To calculate the number of Christians:
Jesus - 793 million results so ~1.96 billion believers.
Or the number of Christians:
Christian - 2,210 million results so ~ 5.5 billion believers.
Or the number of Christians:
Christ - 830 million results so ~2.05 billion believers.
Or the number of Christians:
Christianity - 197 million results so ~487 million believers.
I think I'm noticing a problem.