\project thesis
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  [title={Acknowledgements},
   reference=chap:acknowledgements]

Foremost, I would like to thank my supervisors.
Having three of them ensured that there were always enough ideas to work on, theory to understand, papers to review, seminars to attend, and chats to have.
Frits, thank you for being a very motivating supervisor, pushing creativity, and being only a few meters away.
It started with a small puzzle (trying a certain test algorithm to help with a case study), which was a great, hands-on start of my Ph.D..
You introduced me to the field of model learning in a way that showcases both the theoretical and practical aspects.

Alexandra, thanks for introducing me to abstract reasoning about state machines, the coalgebraic way.
Although not directly shown in this thesis, this way of thinking has helped and you pushed me to pursuit clear reasoning.
Besides the theoretical things I've learned, you have also taught me many personal lessons inside and outside of academia; thanks for inviting me to London, Caribbean islands, hidden cocktail clubs, and the best food.
And thanks for leaving me with Daniela and Matteo, who introduced me to nominal techniques, while you were on sabbatical.

Bas, thanks for broadening my understanding of the topics touched upon in this thesis.
Unfortunately, we have no papers together, but the connections you showed to logic, computational learning, and computability theory have influenced the thesis nevertheless.
I am grateful for the many nice chats we had.

I would like to thank the members of the manuscript committee, Bart, Ana, Falk, S\l{}awek, and Daniela.
Reading a thesis is undoubtedly a lot of work, so thank you for the effort and feedback you have given me.
Thanks, also, to the additional members coming to {\nl Nijmegen\en} to oppose during the defence, Jan Friso, Jorge, and Paul.

On the first floor of the Mercator building, I had the pleasure of spending four years with fun office mates.
Michele, thanks for introducing me to the Ph.D. life, by always joking around.
Hopefully, we can play a game of Briscola again.
Alexis, many thanks for all the tasty {\it\nl proeverijen,\en} wheter it was beers, wines, {\nl poffertjes, kroketten\en}, or anything else.
Your French influences will be missed.
Niels, thanks for the abstract nonsense and bashing on politics.

Next to our office, was the office with Tim, with whom I had the pleasure of working from various coffee houses in Nijmegen.
Further down the corridor, there was the office of Paul and Rick.
Paul, thanks for being the kindest colleague I've had and for inviting us to your musical endeavours.
Rick, thanks for the algorithmic sparring, we had a great collaboration.
Was there a more iconic duo on our floor?
A good contender would be Petra and Ramon.
Thanks for the fun we had with ioco, together with Jan and Mari\"{e}lle.
Nils, thanks for steering me towards probabilistic things and opening a door to Aachen.
I am also very grateful to Jurriaan for bringing back some coalgebra and category theory to our floor, and hosting me in London.
My other co-authors, Wouter, David, Bartek, Micha\l{}, and David, also deserve many credits for all the interesting discussion we had.
Harco, thanks for the technical support.
Special thanks go to Ingrid, for helping with the often-overlooked, but important, administrative matters.

Doing a Ph.D. would not be complete without a good amount of playing kicker, having {\nl borrels\en}, and eating cakes at the iCIS institute.
Thanks to all of you, Markus, Bram, Marc, Sam, Bas, Joost, Dan, Giso, Baris, Simone, Aleks, Manxia, Leon, Jacopo, Gabriel, Michael, Paulus, Marcos, Bas, and Henning.
\footnote[random]{In no particular order. These lists are randomised.}

Thanks to people I have met across the channel (which hopefully will remain part of the EU): Benni, Nath, Kareem, Rueben, Louis, Borja, Fred, Tobias, Paul, Gerco, and Carsten,
for the theoretical adventure, but also for joining me to {\it Phonox} and other parties in London.
I am especially thankful to Matteo and Emanuela for hosting me many times and for Hillary and Justin for accommodating me for three months each.

I had a lot of fun at the IPA events.
I'm very thankful for Tim and Loek for organising these events.
Special thanks to Nico and Priyanka for organising a Halloween social event with me.
Also thanks to all the participants in the IPA events, you made it a lot of fun!
My gratitude extends to all the people I have met at summer schools and conferences.
I had a lot of fun learning about different cultures, languages, and different ways of doing research.
Hope we meet again!

I would also like to thanks all my friends, for hosting me, cooking excellent dinners, or otherwise having fun with me, thank you, Nick, Edo, Gabe, Saskia, Stijn, Sandra, Geert, Marco, Carmen, and Wesley.
Thanks to Marlon, Hannah, Wouter, Dennis, Christiaan, and others from \#RU for {\nl borrels\en}, bouldering, and jams.
Thanks to Ragnar, Josse, Julian, Jeroen, Vincent, and others from the BAPC for algorithmic fun.

Thanks to my parents, Kees and Irene, and my brother, David, and his wife, Germa, for their love and support.
My gratitude extends to my family in law, Ine, Wim, Jolien and Jesse.
My final words of praise go to Tessa, my wife, I am very happy to have you on my side.
You inspire me in many ways, and I enjoy doing all the fun stuff we do.
Thank you a lot.


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