A. A tiny bit of research would suggest her value to the UK, based on her education and position she took within the University when entering the country.
I am addressing the tweet only. This has always been my point. I am suggesting that if all we have, with regards to the time she entered the UK, is the information on the tweet, then no - she should not gain entry (under the proposed criteria). Whatever happened after she entered the country is not relevant, because that information was not available at the time of entry.
B. You keep mentioning hindsight, but it's not really accurate as we didn't have there proposed system in place at the time of entry, and all we have is a comparison of what the situation would be in the future. Objectively, we can look at her achievements and value and suggest that under the proposed system, the UK would be denying entry to a valuable contributor to society. As such, the suggestion would be that the proposed system is flawed.
This person is claiming that she would not be granted access to the UK, under the proposed system. The proposed system may be flawed, but as it stands, the decision to deny her access - based on the points she would gain - is the correct one. Nobody is denying she hasn't made a great contribution to society. Allowances cannot be made for her because she has a PhD. The PhD is, at the time of entry, the only positive thing in the tweet.
C. The serial killer line was ridiculous, as any country would deny that individual entry and, there is no measure, in any immigration system that would identify future intention or criminal intent for those that have never exhibited this behavior before. Minority Report is not yet a reality.
You are correct - the serial killer line is ridiculous. It was used as an extreme example. It was used to highlight the fact that we didn't know who this woman was at the time of entry.
D. The current system or the proposed system?
The proposed system.
Here is a scenario:-
The proposed system is now up and running. Two people are looking to move to the UK. Both have background checks completed, and both are good to go. Neither speak English, and neither have employment arranged. Both seem like nice people. One is a female with a PhD from Poland. The other is male with a PhD from Nigeria. What do you do? Do you let both in? Because they both have PhDs. Do you let neither in? As neither gain the points the criteria demands?
The answer to that has to be "Neither".