Is it still considered Left handed, if you do all other tasks with left hand leaving besides writing and eating?

Yes. I consider one as a Left handed, if one does all other tasks with left hand leaving besides writing and eating?

Disclaimer: This is my personal opinion, not a scientific answer.

I think ‘Writing’ and ‘Eating’ should not be considered as the primary criterion in identifying the ‘handedness’ of a human.

Writing is an acquired skill and it depends on which hand you started training and learnt.

Similarly you can train yourself to write with a specific hand, learn to do normal chores like brushing, shaving, open door with a specific hand, etc. Like the way, I trained myself to eat, shake-hand, serving food, religious rituals, etc with my right hand.

One’s “natural”, “reflex”, “physical”, “instinctive” actions should distinguish that person as a left-handed or right!

· If I throw a dagger/stone at you, would you rise your left hand or right hand to block?

· If I offer you a bag of apples, will you pick with your left/right?

· When you sneeze, do you use your left/right hand to cover your nose? In some cases, this can be trained. I pick my nose with my right hand because my left hand would be busy most times like writing :-) Just kidding.

· I set/comb my hair with left hand

· In an action that needs strength like using spanner for unscrewing/screwing, do you use left/right?

Some websites talk about other ways like

•      “which thumb is on up side when you interlock your fingers?”,
•      “which palm is up when you clap while applauding?”,
•      “which hand is up when you hold hands on your back?”
•      “with which eye do you wink?”

I don’t believe in the above stuff.