“Basic”, as Alex said to The Line of Best Fit, is about a person Alex knew who went through a psychotic episode due to a mental illness which he had secretly coped with:

[…] So many people turned their back on him because of his often unusual, sometimes aggressive behaviour, unaware that he was seriously unwell. It really hurt to see him in that state and it hurt even more witnessing the lack of love, reliability and compassion from those who knew him.