"Rocket" science

The other day, my sister 'misused' this word- "Rocket" science.
I'm an engineer, trust me, my engineering friends will, there's no such thing called rocket science. Everything in engineering comes from a very few basic laws. Everything can be derived from those basic laws, and that is what we learn in UG, PG, Doctoral, even post doctoral. Only thing is, during research, we derive new things! So, next time you try insulting someone saying 'there's no rocket science involved in what you are failing miserably at', remember d engineer u r insulting must be laughing within that u don't know 'rocket science' doesn't exist.
And, if u r taking literal meaning of the said things, yes, there are courses on rocket science- rocket propulsion. But, they are again derived from basics, which even a non-engineering background must have studied till class X with his/her engineering friends!
So, pls don't say 'rocket science'!!!

*Rocket scientists*No offense*

3 marks!

Yes. 3 marks. My XII Maths had chapters on 3D geometry and planes for 3 marks only. So, I didn't study it. Because I wanted a good %. No one cared about what I knew and what I didn't back then. Even today, % gpa grades are what we quantify, tell, share, expose and not the objectives, contents and conclusions of what we study.
That's it. I didn't study that 3 marks thing. Why would I? My parents were happy for I got 97/100 in maths. The classes I attended had my name in their advertisement with my marks. They even gave me a prize for the same. No one cared for those 3 lost marks content. Not even me, till almost today.
That "3 marks content" gave me an inferior feeling about a vast content in Engineering Mathematics, so I just tried staying away from vectors as much as possible. I didn't do good in vector calculus. I was afraid of lines-planes-vectors.....3D geometry!
I felt further bad during courses like Fluid Mechanics, Fluid Machinery, did poorly, managed clearing subjects.
Today, I'm pursuing Masters in Thermal and Fluids Engineering. There's no way out of 'vectors'. I've to deal with it. I'm starting to learn all those skipped-kept distance from things-now.
The point is, please stop judging people from marks. Marks are just an illusion. I'm miserable at maths. You can't quantify people. Even if u make someone go through a series of tests(19yrs in my case), you can't know what a person has been through, what a person has learnt, what he's attitude might be, what his morals would be, there are countless number of things you can't measure. So please stop. Stop asking grades, rather ask what a person's feelings for a subject are, what subject he's passionate about, which subject would a person love to spend his life with, asking marks is as offensive as asking someone's CTC or caste or native!
Just imagine how you would feel if someone asks you the marks of the subject you had failed at. Would you not get a low feeling? You shouldn't make someone feel the way you wouldn't like to.
Neither do grades define character, nor do they define someone's capability. We still aren't capable of measuring all aspects of a human. If you measure social entrepreneurs by the money they generate, they would be rated as worst performers, but socially, nothing brings the joy they do. Someone has correctly said, you can't judge a fish by his ability to climb a tree!