I can see where you’re coming from @Bumpitybumper but you are wrong about how to discern ‘red flags’ / unhealthy behaviour and I will try to explain why.
Comparing riddles with noticing unhealthy or toxic behaviour is not a like for like comparison. Problem solving skills can be learnt, refined and developed. Recognising abusive behaviour is largely influenced by our early experiences, things which are outside of our control - attachment with parents, early experiences of safety and reciprocity in relationships, adversity and trauma, our environment, witnessing our parents and siblings relationships, etc. From this we develop a subconscious template for how relationships work and what is normal. Therefore someone who has experienced interpersonal trauma, who did not feel safe at home, who witnessed DV, for instance - is much more likely to normalise abusive behaviour as they grow up. Because it is what they know to be normal. This is not a matter of intelligence or logic, otherwise this issue would indeed be easy to solve - this all happens on a subconscious, emotional level. People become conditioned to feeling unsafe in relationships as they do not know anything different. So when a partner shouts at them or speaks to them disparagingly, it is not met with the same jolt of shock (underpinned with the belief that this is not okay) as if this were to happen to someone without a history of abuse - because it feels familiar, it is what they have learnt relationships are like. This is exactly WHY this ‘all people should notice red flags’ narrative IS victim blaming - because it implies it’s a failure on the woman’s part to not be perceptive enough, not intelligent or knowledgeable enough to prevent being abused. But we are not all at the same starting point when it comes to recognising abuse for what it is, so it is very unfair to assume otherwise, and that it can just be learnt like solving a rubics cube.
Even if someone does not have a history of abuse or trauma, and has read about ‘red flags’ this does not make them immune to domestic abuse. Many types of abuse, including psychological and emotional abuse, and coercive control, happen very gradually which is why I referenced the boiling frog analogy in my earlier post. Men can often become abusive at a time when a woman is more vulnerable; pregnancy, following illness or bereavement, acute stress. Abusive tactics such as gaslighting serve to undermine a persons sense of self and reality, causing doubt and confusion. The abuser will continue to minimise and manipulate, it is very difficult to spot these behaviours when you are in the situation. And there may not be ‘warning signs’ until you are. Chronic abuse can massively negatively impact someone’s self esteem and self worth and their entire belief system - they end up believing it’s their fault and they cannot ‘do better’ which is one of many reasons why leaving is so hard.
It is NOT comparable to solving a riddle as people who are in abusive relationships do not lack knowledge or intelligence, they often have not had the safe and secure relationships needed to form a healthy working model of what healthy relationships FEEL like. Woman do not need to read lists of red flags; they often still won’t recognise the abuse they are experiencing. Women need to be able to trust their feelings; to recognise when they feel on egg shells; but this isn’t something that can be taught by reading. It takes experience of a healthy relationship to know what one is. Of course I still think there is value in learning about signs of abuse, boundaries etc but it is too simplistic to suggest this alone will stop women being abused. More focus should be on preventing violence against women and girls, and increasing systemic support for vulnerable groups who may be more at risk. These sorts of posts created by the OP, written in an inflammatory and dismissive way, do nothing to improve our understanding of abuse or how to stop men abusing. It is a complex problems that requires a complex solution.