List with arrows in two different directions

Question

The goal is to reproduce this formatting in LaTex (in proving if and only if):

where the entire paragraph is indented except the arrows. Additionally, two arrows are pointing to different directions.

Closest that I have tried: List with arrows instead of bullets where JLDiaz defined a new arrowlist environment. However, under this setting, arrows all have the same direction.

Image source: http://jeffe.cs.illinois.edu/teaching/algorithms/

Answer 1

\documentclass{article}
\begin{document}
\begin{itemize}
 \item[$\Rightarrow$] Given a satisying question that does not force the ones
 answering it to type in texts from a screen shot.
 \item[$\Leftarrow$] Given a set of input parameters satisying some strange
 conditions one will always find someone.
\end{itemize}
\end{document}