PITAGORAS

I start to think you get this logos out of the magic hat, because is like you find them there and you dont use the feedback from the previous ones. The pen symbol is fine , a bit overcrowded but i saw it, you can play something with the "g" there. The font you used is pretty bad, it seems allover the place, the fact that is massive and i guess over tweaked makes too much things happen there.

Keep it simple and refined

Nope. As Hueroth said, you're better off taking in the feedback you got from previous posts rather than going a totally different way every time.

This here logo is a mess. Mainly because you fooled around with the font. The pencil idea is as old as the light bulb one.

If you took all of these designs only as far as the pencil and paper, to begin with, you'd more than likely wind up with something really nice and tuned... you can get a lot more distance from the right stroke of a pen/pencil than messing around in Ai for hours.

I feel pittygoras for an artist with his continues refusal to listen all the reasonable advises that came from members on this blog.

I like the pen in the text idea. The squiggle below the word would be better if you incorporated the descender of the g. I dont like the "a" and dont see the point in the inside of the "o"being tilted its like your whole word is trying to shiver