Do I need a return ticket to enter Thailand if I'm unsure of my stay duration?

The original poster is seeking advice regarding entry into Thailand on a one-way ticket, particularly about whether a return ticket is required. Multiple comments emphasize that while formal entry may not require a return ticket, many airlines will ask for proof of onward travel, especially since the traveler plans to enter on a visa exemption. Suggestions include booking a low-cost onward ticket or a cheap bus ticket to a neighboring country to satisfy airline policies. It's also discussed that these 'onward tickets' can sometimes be just reservations, which might pose a risk of being considered invalid by some airlines. Overall, the advice leans toward having either a return or onward ticket to avoid complications with airline policies or immigration upon entry.