Apologies for being late to the re-education, but what is gender now? I'm aware it used to be interchangeable with biological sex, but what is it now? What is defined by the word gender that is not covered by biological sex, sexuality/sexual preference or individual personality? I've heard the phenotype/perception by the world definition which doesn't fit very well and want to get my head around what we are actually talking about as it all sounds ridiculous.