Who said they could? No one...oh dear
You said that a person sentenced to life imprisonment can apply for parole 4 years before the end of their sentence. Since their sentence is life, applying for parole 4 years before the end of their sentence would require them to reliably predict their own death 4 years in advance. My apologies for not explaining that to you - I thought it was too obvious to need explaining.
And it's life not FULL LIFE.
Wrong again....Try harder.
OK, I will try harder to explain it to you.
In the UK, when a life sentence is passed the sentence is life.
In addition to the sentence of imprisonment, a judge can also assign a minimum period of time before the prisoner can apply for parole. This is called a tariff.
It's not the sentence.
You are confusing a sentence with the minimum period of time before which an application for parole will be considered.
Incidentally, the phrase is "whole life order" or "whole life tariff", not "full life". Not even if you shout it.
If you need more explanation, I suggest this brief explanation of life sentences from the sentencing council (which is the official body for sentencing in the UK):
https://www.sentencingcouncil.org.uk/about-sentencing/types-of-sentence/life-sentences/
EDIT: To save you the effort of clicking on a link, I'll quote the most relevant part from that page.
When a court passes a life sentence it means that the offender will be subject to that sentence for the rest of their life. When passing a life sentence, a judge must specify the minimum term (sometimes called the tariff) an offender must spend in prison before becoming eligible to apply for parole. The only exception to this is when a life sentence is passed with a ‘whole life order’ meaning that such an offender will spend the rest of their life in prison. A life sentence always lasts for life whatever the length of the minimum term.
Note that this is the official statement from the relevant body, which is more reliable than media click-baiting and ignorant rumours.
